[Federal Register Volume 79, Number 60 (Friday, March 28, 2014)]
[Rules and Regulations]
[Pages 17416-17422]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2014-04954]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-1253; Directorate Identifier 2011-NM-079-AD; 
Amendment 39-17723; AD 2013-26-14]
RIN 2120-AA64


Airworthiness Directives; Airbus Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: We are superseding Airworthiness Directive (AD) 2008-08-04 for 
certain Airbus Model A318, A319, A320, and A321 series airplanes. AD 
2008-08-04 required repetitive inspections for cracking in the forward 
lug of the support rib 5 fitting of the left and right main landing 
gear (MLG), and repair or replacement of any cracked MLG fitting if 
necessary. AD 2008-08-04 also required modification of the rib bushings 
of the left and right MLG, which ended the repetitive inspections. This 
new AD requires, for airplanes on which certain modifications or 
repairs have been done, repetitive inspections for cracks of the 
forward lug of each left-hand and right-hand MLG support rib 5 fitting, 
and repair if necessary; and adds Model A318 series airplanes to the 
applicability. Replacement of an MLG support rib 5 fitting terminates 
the repetitive inspection requirements for the MLG support rib 5 
fitting at that position. This AD was prompted by reports of cracks 
found in the forward lug of the MLG support rib 5 fitting. We are 
issuing this AD to prevent cracking in the forward lug of the MLG, 
which could result in failure of the lug and consequent collapse of the 
MLG during takeoff or landing.

DATES: This AD becomes effective May 2, 2014.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of May 2, 2014.
    The Director of the Federal Register approved the incorporation by 
reference of a certain other publication listed in this AD as of May 
19, 2008 (73 FR 19975, April 14, 2008).

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2011-1253; or in person at the 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room

[[Page 17417]]

W12-140, 1200 New Jersey Avenue SE., Washington, DC.
    For service information identified in this AD, contact Airbus, 
Airworthiness Office--EIAS, 1 Rond Point Maurice Bellonte, 31707 
Blagnac Cedex, France; telephone +33 5 61 93 36 96; fax +33 5 61 93 44 
51; email: [email protected]; Internet http://www.airbus.com. You may view this referenced service information at the 
FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. 
For information on the availability of this material at the FAA, call 
425-227-1221.

FOR FURTHER INFORMATION CONTACT: Sanjay Ralhan, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 425-227-1405; 
fax 425-227-1149.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a supplemental notice of proposed rulemaking (SNPRM) to 
amend 14 CFR part 39 to supersede AD 2008-08-04, Amendment 39-15456 (73 
FR 19975, April 14, 2008). AD 2008-08-04 applied to certain Airbus 
Model A318, A319, A320, and A321 series airplanes. The SNPRM published 
in the Federal Register on October 3, 2012 (77 FR 60325). We preceded 
the SNPRM with a notice of proposed rulemaking (NPRM) that published in 
the Federal Register on November 23, 2011 (76 FR 72350). The NPRM 
proposed to continue to require repetitive inspections for cracking in 
the forward lug of the support rib 5 fitting of the left and right main 
landing gear (MLG), and repair or replacement of any cracked MLG 
fitting if necessary; and modification of the rib bushings of the left 
and right MLG, which ended the repetitive inspections. The NPRM also 
proposed to require, for airplanes on which certain modifications or 
repairs have been done, repetitive inspections for cracks of the 
forward lug of each left-hand and right-hand MLG support rib 5 fitting, 
and repair if necessary; and to remove Model A318 series airplanes from 
the applicability. The NPRM was prompted by reports of cracks found in 
the forward lug of the MLG support rib 5 fitting. The SNPRM proposed to 
revise the NPRM by adding Model A318 airplanes and others to the 
applicability; and requiring repetitive detailed inspections for cracks 
of the MLG support 5 fitting, and repair of any cracks. We are issuing 
this AD to prevent cracking in the forward lug of the MLG, which could 
result in failure of the lug and consequent collapse of the MLG during 
takeoff or landing.
    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Community, has issued EASA 
Airworthiness Directive 2012-0032, dated February 24, 2012 (referred to 
after this as the Mandatory Continuing Airworthiness Information, or 
``the MCAI''), to correct an unsafe condition for the specified 
products. The MCAI states:

    Several cases of corrosion of the Main Landing Gear (MLG) 
support Rib 5 fitting lug bores have been reported on A320 family 
aeroplanes. In some instances, corrosion pits caused the cracking of 
the forward lug (sometimes through its complete thickness). If not 
detected, the cracking may lead to the complete failure of the 
fitting and thus could affect the structural integrity of the MLG 
installation.
    EASA AD 2007-0213 [(http://ad.easa.europa.eu/blob/easa_ad_2007_0213_superseded.pdf/AD_2007-0213_1), which corresponds to 
FAA AD 2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008)] 
was issued to address this condition and required a repetitive 
inspection program of the MLG support Rib 5 fitting forward lugs 
and, as terminating action, the embodiment of Airbus Service 
Bulletin (SB) A320-57-1118.
    After that [EASA] AD was issued, a case of Rib 5, ruptured at 
the 4 o'clock position, was discovered on an aeroplane on which the 
terminating action of EASA AD 2007-0213 had already been embodied in 
accordance with Airbus SB A320-57-1118.
    Investigation of that case revealed that corrosion damage and 
cracking that should have been removed by repair machining was below 
the level of detectability of the Non Destructive Test (NDT) 
technique that cleared the surfaces prior to bush installation.
    This condition, if not detected and corrected, could affect the 
structural integrity of the aeroplane.
    To correct this potential unsafe condition, EASA issued AD 2011-
0011 [(http://ad.easa.europa.eu/blob/easa_ad_2011_0011_superseded.pdf/AD_2011-0011_1), which corresponds to FAA AD 2012-
15-17 (77 FR 47273, August 8, 2012)], superseding EASA AD 2007-0213, 
to:

--retain the requirements of EASA AD 2007-0213 for aeroplanes on 
which the MLG Rib Bushes have not been modified/repaired in 
accordance with the instructions of Airbus SB A320-57-1118, or 
Airbus SRM 57-26-13, or the identified Airbus Repair Instructions, 
as applicable, and
--require, for all aeroplanes on which Airbus SB A320-57-1118 has 
been embodied in service, or on which Airbus SRM 57-26-13 or the 
identified Airbus Repair Instructions have been applied, a 
repetitive inspection program [for cracks] of the MLG support Rib 5 
fitting forward lugs and, depending on findings, the accomplishment 
of the associated corrective actions, and
--reduce the Applicability by deleting A318 aeroplanes, as Airbus 
modification 32025 is embodied in production on both left-hand (LH) 
and right-hand (RH) wings for all A318 aeroplanes.

    After that [EASA] AD was issued, three cases of corrosion of Rib 
5 were discovered on aeroplanes on which Airbus modification 32025 
had been embodied in production. Investigations revealed that the 
unsafe condition addressed by [EASA] AD 2011-0011 could occur or 
develop on those aeroplanes as well.
    For the reasons described above, this [EASA] AD retains the 
requirements of EASA AD 2011-0011, which is superseded, extends the 
applicability to all aeroplanes, and requires for aeroplanes on 
which Airbus modification 32025 has been embodied in production, 
repetitive inspections of the MLG support Rib 5 fitting forward lugs 
and, depending on findings, the accomplishment of applicable 
corrective actions.

The unsafe condition is cracking in the forward lug of the MLG, which 
could result in failure of the lug and consequent collapse of the MLG 
during takeoff or landing. You may examine the MCAI in the AD docket on 
the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2011-
1253-0002.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comments received.

Support for the SNPRM (77 FR 60325, October 3, 2012)

    United Airlines (UAL) stated that it generally agrees with the 
intent of the SNPRM (77 FR 60325, October 3, 2012).
    US Airways (AWE) stated that it agrees with the need to add the 
post-modification inspections, because the mandated bushing 
modification has not proven to be an effective permanent corrective 
action. AWE also stated that it agrees with the method and frequency of 
these additional inspections.

Request To Extend Compliance Time

    UAL requested that we extend the compliance time specified in 
paragraph (n)(2) of the SNPRM (77 FR 60325, October 3, 2012) from 
within 2,000 flight cycles after accomplishing the modification or 
within 250 flight cycles after the effective date of the AD, without 
exceeding 3 months after the effective date of the AD, whichever occurs 
later. UAL requested that the compliance time be changed to within 500 
flight cycles after the effective date of the AD or within 6 months 
after the effective date of the AD, whichever occurs later. UAL stated 
that the majority of its Model A319 and A320 series airplanes have 
accumulated more than 2,000 flight cycles since

[[Page 17418]]

accomplishing the modification. UAL stated that it is requesting this 
change in order to ``reduce the impact due to the special routing 
required for the inspection,'' possible MLG removal for repair/
replacement of MLG support rib 5 fitting, and a large demand on man-
power. UAL stated that extending the compliance time will allow it to 
perform the required inspection at a more suitable maintenance 
opportunity.
    We do not agree with the commenter's request to extend the 
compliance time in paragraph (n)(2) of this AD. The commenter did not 
provide technical justification for extending the compliance time. The 
compliance time for the actions specified in paragraph (n)(2) in this 
AD was developed after conducting a risk assessment and analyzing the 
impact on operators. In consideration of these factors, we determined 
that the compliance times, as proposed, represent an appropriate 
interval in which to conduct the inspection after the modification 
within the fleet, while still maintaining an adequate level of safety. 
However, under the provisions of paragraph (u) of this AD, we might 
approve requests for adjustments to the compliance time if data are 
submitted to substantiate that such an adjustment would provide an 
acceptable level of safety. We have not changed this final rule in this 
regard.

Requests To Include Revised Service Information

    Airbus and AWE requested that we add Airbus Mandatory Service 
Bulletin A320-57-1118, Revision 05, dated July 23, 2012, to paragraph 
(m) of the SNPRM (77 FR 60325, October 3, 2012). Airbus also requested 
that we add Airbus Service Bulletin A320-57-1118, Revision 03, dated 
April 23, 2007; and Revision 04, dated June 4, 2008; to paragraph 
(t)(5) of the SNPRM. AWE stated that adding Airbus Mandatory Service 
Bulletin A320-57-1118, Revision 05, dated July 23, 2012, as authorized 
instructions for modification work would reduce alternative method of 
compliance coordination.
    We partially agree with the commenters' requests. Airbus Mandatory 
Service Bulletin A320-57-1118, Revision 05, dated July 23, 2012, states 
that ``no additional work is required by this revision for airplanes 
modified by any previous issue.'' However, this service bulletin 
revision adds a liquid penetrant inspection. We have added Airbus 
Mandatory Service Bulletin A320-57-1118, Revision 05, dated July 23, 
2012, in paragraph (m) of this final rule as an appropriate source of 
service information, and specified that the liquid penetrant inspection 
specified in this service information is not required by this AD. We 
have added paragraphs (t)(5)(iv) and (t)(5)(v) to this final rule to 
provide credit for certain actions accomplished before May 19, 2008 
(the effective date of AD 2008-08-04, Amendment 39-15456 (73 FR 19975, 
April 18, 2008)), using Airbus Service Bulletin A320-57-1118, Revision 
03, dated April 23, 2007; or Revision 04, dated June 4, 2008.

Requests To Change Certain Document References

    AWE requested we revise the service bulletin reference in the 
Relevant Service Information section of the SNPRM from ``A320-75-1168'' 
to ``A320-57-1168.'' Airbus requested that we correct references to 
Airbus Repair Drawings ``R57258209'' and ``R57245019'' in paragraph 
(g)(3) of the SNPRM to Airbus Repair Drawing ``R572-58209'' and ``R572-
45019,'' respectively. Airbus also requested that we amend paragraph 
(h)(2) of the SNPRM (77 FR 60325, October 3, 2012) to refer to ``NTM 
task 57-29-03-270-801-A-01 for A318/A319/A320 and NTM task 57-29-04-
270-801-A-01 for A321 [series airplanes].''
    We agree with the commenters' requests. The Relevant Service 
Information section of the SNPRM referenced by AWE is not restated in 
this final rule; therefore, no change to this final rule is needed in 
this regard. The content of paragraph (g)(3) of the SNPRM (77 FR 60325, 
October 3, 2012) referenced by Airbus was located in paragraph (j)(3) 
of the SNPRM, not in paragraph (g)(3) of the SNPRM, as the commenter 
specified. We have revised paragraphs (h)(2) and (j)(3) of this final 
rule accordingly.

Request To Include Repair Drawing

    AWE requested that we include Airbus Repair Drawing R572-48341 in 
paragraph (g)(2) of the SNPRM (77 FR 60325, October 3, 2012). AWE 
stated that this drawing is the current and most advanced version of 
the repair scheme for corrosion and crack findings, and that Airbus 
issues this drawing when operators request repair design data. AWE also 
stated that there are still some issues with the details of this repair 
drawing, but it has collected comments and submitted them to Airbus for 
incorporation. AWE also noted that Airbus drawing number ``R572481'' 
cited (by a different commenter) under ``Request to Reference a Repair 
Drawing'' in the preamble of the SNPRM (77 FR 60325, October 3, 2012) 
should be ``R572-48341.''
    We disagree with the commenter's request. The commenter did not 
provide specific data to substantiate that airplanes repaired with 
Airbus Repair Drawing R572-48341 would be applicable to the MLG support 
rib 5 fitting configuration. The commenter also did not provide 
justification for including a document with potential errors. However, 
according to the provisions of paragraph (u) of this AD, we might 
approve requests to include airplanes repaired by Airbus Repair Drawing 
R572-48341 as an appropriate action for the MLG support rib 5 fitting 
repair specified in paragraph (j)(2) of this AD. We have not changed 
this final rule in this regard.

Additional Changes Made to This Final Rule

    We have converted table 1 to paragraph (k) of the SNPRM (77 FR 
60325, October 3, 2012) to the text given in paragraphs (k)(1) and 
(k)(2) of this final rule for formatting purposes only.
    We have also revised table 2 to paragraph (r)(4) of the SNPRM (77 
FR 60325, October 3, 2012) to figure 1 to paragraph (r)(4) of this AD 
for formatting purposes only.
    We have revised the citation of the service information referenced 
in paragraph (t)(2) of the SNPRM (77 FR 60325, October 3, 2012) and 
moved the service information into new paragraphs (t)(2)(i) and 
(t)(2)(ii) of this AD. The documents have not changed.

Conclusion

    We reviewed the available data, including the comments received, 
and determined that air safety and the public interest require adopting 
this AD with the changes described previously and minor editorial 
changes. We have determined that these changes:
     Are consistent with the intent that was proposed in the 
SNPRM (77 FR 60325, October 3, 2012) for correcting the unsafe 
condition; and
     Do not add any additional burden upon the public than was 
already proposed in the SNPRM (77 FR 60325, October 3, 2012).

Differences Between This AD and the MCAI or Service Information

    This AD differs from the MCAI and/or service information as 
follows:
     Although the MCAI or service information allows further 
flight after cracks are found during compliance with certain required 
actions, paragraphs (l) and (p) of this AD require repair or 
replacement before further flight.
     Airbus Mandatory Service Bulletin A320-57-1118, Revision 
05, dated July

[[Page 17419]]

23, 2012, describes a liquid penetrant inspection. This AD does not 
require that inspection.

Costs of Compliance

    We estimate that this AD will affect about 740 products of U.S. 
registry.
    The actions that are required by AD 2008-08-04, Amendment 39-15456 
(73 FR 19975, April 14, 2008), and retained in this AD take about 73 
work-hours per product, at an average labor rate of $85 per work-hour. 
Required parts cost about $3,860 per product. Based on these figures, 
the estimated cost of the currently required actions is $10,065 per 
product.
    We estimate that it will take about 3 work-hours per product to 
comply with the new basic requirements of this AD. The average labor 
rate is $85 per work-hour. Based on these figures, we estimate the cost 
of this AD to the U.S. operators to be up to $188,700, or $255 per 
product.
    We have received no definitive data that would enable us to provide 
cost estimates for the on-condition actions specified in this AD.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this AD will not have federalism implications 
under Executive Order 13132. This AD will not have a substantial direct 
effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska; and
    4. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov/#!docketDetail;D=FAA-2011-1253; or in person at the 
Docket Operations office between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays. The AD docket contains this AD, the 
regulatory evaluation, any comments received, and other information. 
The street address for the Docket Operations office (telephone 800-647-
5527) is in the ADDRESSES section.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing airworthiness directive (AD) 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), and 
adding the following new AD:

2013-26-14 Airbus: Amendment 39-17723. Docket No. FAA-2011-1253; 
Directorate Identifier 2011-NM-079-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective May 2, 2014.

(b) Affected ADs

    This AD supersedes AD 2008-08-04, Amendment 39-15456 (73 FR 
19975, April 14, 2008).

(c) Applicability

    This AD applies to Airbus Model A318-111, A318-112, A318-121, 
A318-122, A319-111, A319-112, A319-113, A319-114, A319-115, A319-
131, A319-132, A319-133, A320-111, A320-211, A320-212, A320-214, 
A320-231, A320-232, A320-233, A321-111, A321-112, A321-131, A321-
211, A321-212, A321-213, A321-231, and A321-232 airplanes, 
certificated in any category, all manufacturer serial numbers.

(d) Subject

    Air Transport Association (ATA) of America Code 57, Wings.

(e) Reason

    This AD was prompted by reports of cracks found in the forward 
lug of the main landing gear (MLG) support rib 5 fitting. We are 
issuing this AD to prevent cracking in the forward lug of the MLG, 
which could result in failure of the lug and consequent collapse of 
the MLG during takeoff or landing.

(f) Compliance

    You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

(g) Retained Repetitive Detailed Inspections With Changes

    This paragraph restates the requirements of paragraph (f) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), with 
changes. Except for airplanes on which Airbus modification 32025 has 
been accomplished in production, within 8 days after June 7, 2006 
(the effective date of AD 2006-11-04, Amendment 39-14608 (71 FR 
29578, May 23, 2006)), or before further flight after a hard 
landing, whichever is first: Perform a detailed inspection for 
cracking in the forward lug of the support rib 5 fitting of the 
left- and right-hand MLG, and, if any crack is found, replace the 
MLG fitting with a new fitting before further flight, in accordance 
with a method approved by the Manager, International Branch, ANM-
116, Transport Airplane Directorate, FAA, or the European Aviation 
Safety Agency (EASA) (or its delegated agent). Repeat the inspection 
thereafter at intervals not to exceed 8 days, or before further 
flight after a hard landing, whichever is first. As of May 19, 2008 
(the effective date of AD 2008-08-04), the repetitive inspections 
required by paragraph (k) of this AD must be accomplished in lieu of 
the repetitive inspections required by this paragraph.

(h) Retained Optional Inspection Method With Revised Service 
Information

    This paragraph restates the provisions of paragraph (g) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), with 
revised service information. Performing an ultrasonic inspection for 
cracking in the forward lug of the support rib 5 fitting of the 
left- and right-hand MLG, in accordance with an applicable method 
specified in paragraph (h)(1) or (h)(2) of this AD, is an acceptable 
alternative method of compliance for the initial and repetitive 
inspections required by paragraph (g) of this AD.
    (1) In accordance with a method approved by the Manager, 
International Branch, ANM-116, or the EASA (or its delegated agent).
    (2) In accordance with Task 57-29-03-270-801-A-01, Gear Rib 
Forward Lug Attachment for the Main Gear Before Modification 
32025J2211, of Subject 57-29-03, Inspection of the Gear Rib Forward 
and

[[Page 17420]]

Aft Lug Attachment for the Main Gear (for Model A318, A319, and A320 
series airplanes); or Task 57-29-04-270-801-A-01, Gear Rib Forward 
Lug Attachment for the Main Gear Before Modification 32025J2211, of 
Subject 57-29-04, Inspection of the Gear Rib Forward and Aft Lug 
Attachment for the Main Gear (for Model A321 series airplanes); both 
of Chapter 57, Wings, of the Airbus A318/A319/A320/A321 
Nondestructive Testing Manual, Revision 89, dated August 1, 2011.

(i) Retained Optional Terminating Action With Changes

    This paragraph restates the provisions of paragraph (h) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), with 
changes. Repair of the forward lugs of the support rib 5 fitting of 
the left- and right-hand MLG done before the effective date of this 
AD, in accordance with a method approved by the Manager, 
International Branch, ANM-116, or the EASA (or its delegated agent), 
constitutes terminating action for the requirements of paragraphs 
(g), (h), (k), (l), and (m) of this AD.

(j) New Referenced Conditions With Revised Affected Airplanes

    To identify affected airplanes in paragraphs (k), (m), and (o) 
of this AD, this AD refers to the following conditions:
    (1) Airplanes on which the modification of the MLG rib bushes 
specified in Airbus Mandatory Service Bulletin A320-57-1118 has been 
done.
    (2) Airplanes on which a repair of the MLG support rib 5 
fitting, as specified in paragraph 5.C. of Subsection 57-26-13, 
Attachments--Main Landing Gear, of the Airbus A319 Structural Repair 
Manual (SRM), Revision November 1, 2004; paragraph 5.D. of 
Subsection 57-26-13, Attachments--Main Landing Gear, of the Airbus 
A320 SRM, Revision November 1, 2004; or paragraph 5.D. of Subsection 
57-26-13, Attachments--Main Landing Gear, of the Airbus A321 SRM, 
Revision February 1, 2005; as applicable; has been done.
    (3) Airplanes on which replacement in service of the MLG support 
rib 5 specified in Airbus Repair Instruction R572-58507 and Airbus 
Repair Drawing R572-58209, or Airbus Repair Instruction R572-45020 
and Airbus Repair Drawing R572-45019, as applicable, has been done.

(k) Retained Repetitive Inspections With Changes

    This paragraph restates the requirements of paragraph (i) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), with 
changes. For airplanes on which none of the actions specified in 
paragraphs (j)(1), (j)(2), and (j)(3) of this AD have been done, 
except for airplanes on which Airbus modification 32025 has been 
accomplished: At the applicable time specified in paragraphs (k)(1) 
and (k)(2) of this AD, or before further flight after a hard 
landing, whichever is first, do a visual inspection or ultrasonic 
inspection for cracking in the forward lug of the support rib 5 
fitting of the left and right MLG, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-57-1138, 
Revision 01, dated October 27, 2006. Repeat the inspection 
thereafter at the applicable interval specified paragraphs (k)(1) 
and (k)(2) of this AD, or before further flight after a hard 
landing, whichever is first, until the modification required by 
paragraph (m) of this AD has been accomplished. Accomplishing the 
initial inspection terminates the requirements of paragraph (g) of 
this AD.
    (1) For Model A318, A319, and A320 airplanes, inspect at the 
applicable times specified in paragraphs (k)(1)(i) and (k)(1)(ii) of 
this AD.
    (i) If the most recent inspection is a detailed inspection done 
in accordance with paragraph (g) of this AD: Inspect within 150 
flight cycles after the most recent detailed inspection. Repeat the 
inspection thereafter at intervals not to exceed 150 flight cycles 
after a visual inspection.
    (ii) If the most recent inspection is an ultrasonic inspection 
done in accordance with paragraph (h) of this AD: Inspect within 940 
flight cycles after the most recent ultrasonic inspection. Repeat 
the inspection thereafter at intervals not to exceed 940 flight 
cycles after an ultrasonic inspection.
    (2) For Model A321 airplanes, inspect at the applicable times 
specified in paragraphs (k)(2)(i) and (k)(2)(ii) of this AD.
    (i) If the most recent inspection is a detailed inspection done 
in accordance with paragraph (g) of this AD: Inspect within 100 
flight cycles after the most recent detailed inspection. Repeat the 
inspection thereafter at intervals not to exceed 100 flight cycles 
after a visual inspection.
    (ii) If the most recent inspection is an ultrasonic inspection 
done in accordance with paragraph (h) of this AD: Inspect within 630 
flight cycles after the most recent ultrasonic inspection. Repeat 
the inspection thereafter at intervals not to exceed 630 flight 
cycles after an ultrasonic inspection.

(l) Retained Corrective Action

    This paragraph restates the requirements of paragraph (j) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008). If any 
cracking is found during any inspection required by paragraph (k) of 
this AD: Before further flight, repair or replace the cracked MLG 
fitting, in accordance with a method approved by the Manager, 
International Branch, ANM-116, or the EASA (or its delegated agent).

(m) Retained Rib Bushing Modification With Revised Service Information

    This paragraph restates the requirements of paragraph (k) of AD 
2008-08-04, Amendment 39-15456 (73 FR 19975, April 14, 2008), with 
revised service information. Except for airplanes on which the 
actions specified in paragraph (j)(1) or (j)(3) of this AD have been 
done, and except for airplanes on which Airbus modification 32025 
have been done: Within 60 months after May 19, 2008 (the effective 
date of AD 2008-08-04), modify the rib bushings of the left and 
right MLG, by accomplishing all of the applicable actions specified 
in the Accomplishment Instructions of Airbus Mandatory Service 
Bulletin A320-57-1118, Revision 05, dated July 23, 2012, except that 
the liquid penetrant inspection specified in this service 
information is not required by this AD. Accomplishing this 
modification terminates the requirements of paragraphs (g) and (k) 
of this AD, and then the requirements of paragraph (n) of this AD 
must be done.

(n) New Post-Modification/Post-Repair Inspections

    For airplanes on which the actions specified in paragraph 
(j)(1), (j)(2), or (m) of this AD have been done: At the later of 
the times specified in paragraphs (n)(1) and (n)(2) of this AD, do a 
detailed inspection for cracks of the forward lug of each left-hand 
and right-hand MLG support rib 5 fitting, in accordance with the 
Accomplishment Instructions of Airbus Mandatory Service Bulletin 
A320-57A1166, Revision 01, dated October 19, 2011. Repeat the 
inspection thereafter at intervals not to exceed 500 flight cycles.
    (1) Within 2,000 flight cycles after accomplishing the 
modification specified in paragraph (j)(1) or (m) of this AD, or the 
repair specified in paragraph (j)(2) of this AD, as applicable.
    (2) Within 250 flight cycles after the effective date of this 
AD, without exceeding 3 months after the effective date of this AD.

(o) New Repair of Cracking Found During Post-Modification/Post-Repair

    If any crack is detected during any inspection required by 
paragraph (n) of this AD: Before further flight, repair using a 
method approved by either the Manager, International Branch, ANM-
116, FAA, or the EASA (or its delegated agent).

(p) New Optional Terminating Action

    Replacement of a MLG support rib 5 fitting at any position 
(left-hand or right-hand), as specified in paragraph (j)(3) of this 
AD, terminates the requirements of paragraphs (k) and (n) of this AD 
for the MLG support rib 5 fitting at that position.

(q) New Repetitive Detailed Inspection for Certain Airplanes

    For airplanes on which the actions specified in paragraph (j)(3) 
of this AD have been done: Within 60 months after the replacement or 
within 500 flight cycles after the effective date of this AD, 
whichever occurs later, do a detailed inspection of the forward lug 
of each left-hand and right-hand MLG support rib 5 fitting that has 
been replaced, in accordance with the Accomplishment Instructions of 
Airbus Mandatory Service Bulletin A320-57A1166, Revision 01, dated 
October 19, 2011. Repeat the inspection thereafter at intervals not 
to exceed 500 flight cycles.

(r) New Repetitive Inspections for Airplanes With Airbus Modification 
32025

    For airplanes on which Airbus modification 32025 has been done: 
At the applicable time specified in paragraph (r)(1) (r)(2), (r)(3), 
or (r)(4) of this AD, do a detailed inspection for cracks of the 
forward lug of each left-hand and right-hand MLG support rib 5 
fitting, in accordance with the Accomplishment Instructions of 
Airbus Service Bulletin A320-57-1168, dated November 7, 2011. Repeat 
the inspection

[[Page 17421]]

thereafter at intervals not to exceed 500 flight cycles.
    (1) For airplanes on which the MLG support rib 5 has not been 
modified or repaired since the first flight of the airplane as of 
the effective date of this AD: Within 60 months after the first 
flight of the airplane, or within 500 flight cycles after the 
effective date of this AD, whichever occurs later.
    (2) For airplanes on which the MLG support rib 5 has been 
replaced as specified in paragraph (j)(3) of this AD as of the 
effective date of this AD: Within 60 months after the replacement of 
the MLG support rib 5, or within 500 flight cycles after the 
effective date of this AD, whichever occurs later.
    (3) For airplanes on which the MLG support rib 5 has been 
repaired according to the SRM or a repair approval sheet as of the 
effective date of this AD: At the later of the times specified in 
paragraph (r)(3)(i) or (r)(3)(ii) of this AD.
    (i) Within 2,000 flight cycles after the repair.
    (ii) Within 250 flight cycles or 3 months after the effective 
date of this AD, whichever occurs first.
    (4) For airplanes having a manufacturer serial number (S/N) 
listed in figure 1 to paragraph (r)(4) of this AD, and on which the 
MLG support rib 5 has been inspected before the effective date of 
this AD according to specific Airbus repair instructions or 
technical disposition: At the later of the times specified in 
paragraph (r)(4)(i) or (r)(4)(ii) of this AD.

                 Figure 1 to Paragraph (r)(4) of This AD
                   [Manufacturer serial number (S/N)]
------------------------------------------------------------------------
 
------------------------------------------------------------------------
                                  S/N--
------------------------------------------------------------------------
          1965                     2056                     2155
          2274                     2278                     2288
          2321                     2478                     2586
          2588                     2612                     2672
          2688                     2707                     2929
          2942                     3089                     3117
          3361                     3427                     3486
          3489                     3806                     3891
          3937                     4243                     4345
------------------------------------------------------------------------

    (i) Within 2,000 flight cycles after the last inspection done 
using specific Airbus repair instructions or a technical 
disposition, or within 60 months since first flight of the airplane, 
whichever occurs later.
    (ii) Within 250 flight cycles or 3 months after the effective 
date of this AD, whichever occurs first.

(s) New Repair of Cracking

    If any crack is detected during any inspection required by 
paragraph (q) or (r) of this AD: Before further flight, repair using 
a method approved by either the Manager, International Branch, ANM-
116, FAA, or the EASA (or its delegated agent).

(t) Credit for Previous Actions

    (1) This paragraph provides credit for the actions required by 
paragraph (g) of this AD, if those actions were performed before the 
effective date of this AD using Chapter 51-90-00 of the Airbus A318/
A319/A320/A321 Nondestructive Testing Manual, Revision February 1, 
2003, which is not incorporated by reference in this AD.
    (2) This paragraph provides credit for the actions required by 
paragraph (h) of this AD, if those actions were performed before the 
effective date of this AD using the service information specified in 
paragraph (t)(2)(i) or (t)(2)(ii) of this AD.
    (i) Chapter 57-29-03 of the Airbus A318/A319/A320/A321 
Nondestructive Testing Manual, Revision February 1, 2005 (for Model 
A318, A319, and A320 airplanes), which is not incorporated by 
reference in this AD.
    (ii) Chapter 57-29-04 of the Airbus A318/A319/A320/A321 
Nondestructive Testing Manual, Revision May 1, 2005 (for Model A321 
airplanes), which is not incorporated by reference in this AD.
    (3) This paragraph provides credit for the actions specified in 
paragraph (i) of this AD, if those actions were performed before the 
effective date of this AD using the applicable service information 
specified in paragraph (t)(3)(i), (t)(3)(ii), or (t)(3)(iii) of this 
AD.
    (i) Paragraph 5.C. of Chapter 57-26-13, Attachments--Main 
Landing Gear, of the Airbus A319 SRM, Revision November 1, 2004, 
which is not incorporated by reference in this AD.
    (ii) Paragraph 5.D. of Chapter 57-26-13, Attachments--Main 
Landing Gear, of the Airbus A320 SRM, Revision November 1, 2004, 
which is not incorporated by reference in this AD.
    (iii) Paragraph 5.D. of Chapter 57-26-13, Attachments--Main 
Landing Gear, of the Airbus A321 SRM, Revision February 1, 2005, 
which is not incorporated by reference in this AD.
    (4) This paragraph provides credit for the inspections required 
by paragraphs (n) and (r) of this AD, if the inspections were 
performed before the effective date of this AD using Airbus Service 
Bulletin A320-57A1166, dated January 12, 2011, which is not 
incorporated by reference in this AD.
    (5) This paragraph provides credit for the modification required 
by paragraph (m) of this AD, if the modification was performed 
before May 19, 2008 (the effective date of AD 2008-08-04, Amendment 
39-15456 (73 FR 19975, April 14, 2008), using the service 
information identified in paragraph (t)(5)(i), (t)(5)(ii), 
(t)(5)(iii), (t)(5)(iv), or (t)(5)(v) of this AD.

(i) Airbus Service Bulletin A320-57-1118, dated September 5, 2002, 
which is not incorporated by reference in this AD.
(ii) Airbus Service Bulletin A320-57-1118, Revision 01, dated August 
28, 2003, which is not incorporated by reference in this AD.
(iii) Airbus Service Bulletin A320-57-1118, Revision 02, dated 
August 2, 2006, which is not incorporated by reference in this AD.
(iv) Airbus Service Bulletin A320-57-1118, Revision 03, dated April 
23, 2007, which is not incorporated by reference in this AD.
(v) Airbus Mandatory Service Bulletin A320-57-1118, Revision 04, 
dated June 4, 2008, which is not incorporated by reference in this 
AD.

(u) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
has the authority to approve AMOCs for this AD, if requested using 
the procedures found in 14 CFR 39.19. In accordance with 14 CFR 
39.19, send your request to your principal inspector or local Flight 
Standards District Office, as appropriate. If sending information 
directly to the International Branch, send it to ATTN: Sanjay 
Ralhan, Aerospace Engineer, International Branch, ANM-116, Transport 
Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, WA 98057-
3356; telephone 425-227-1405; fax 425-227-1149. Information may be 
emailed to: [email protected]. Before using any 
approved AMOC, notify your appropriate principal inspector, or 
lacking a principal inspector, the manager of the local flight 
standards district office/certificate holding district office. The 
AMOC approval letter must specifically reference this AD. AMOCs 
approved previously in accordance with AD 2006-11-04, Amendment 39-
14608 (71 FR 29578, May 23, 2006); and AD 2008-08-04, Amendment 39-
15456 (73 FR 19975, April 14, 2008); are approved as AMOCs for the 
corresponding provisions of this AD.
    (2) Airworthy Product: For any requirement in this AD to obtain 
corrective actions from a manufacturer or other source, use these 
actions if they are FAA-approved. Corrective actions are considered 
FAA-approved if they are approved by the State of Design Authority 
(or their delegated agent). You are required to ensure the product 
is airworthy before it is returned to service.

(v) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) EASA Airworthiness Directive 2012-0032, dated February 24, 
2012, for related information. You may examine the MCAI in the AD 
docket on the Internet at http://www.regulations.gov/#!documentDetail;D=FAA-2011-1253-0002.
    (2) Service information identified in this AD that is not 
incorporated by reference in this AD may be obtained at the 
addresses specified in paragraphs (w)(5) and (w)(6) of this AD.

(w) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use the following service information to do the 
actions required by this AD, unless the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
May 2, 2014.

(i) Airbus Mandatory Service Bulletin A320-57-1118, Revision 05, 
dated July 23, 2012.
(ii) Airbus Mandatory Service Bulletin A320-57A1166, Revision 01, 
dated October 19, 2011.
(iii) Airbus Service Bulletin A320-57-1168, dated November 7, 2011.

[[Page 17422]]

(iv) Task 57-29-03-270-801-A-01, Gear Rib Forward Lug Attachment for 
the Main Gear Before Modification 32025J2211, of Subject 57-29-03, 
Inspection of the Gear Rib Forward and Aft Lug Attachment for the 
Main Gear, of Chapter 57, Wings, of the Airbus A318/A319/A320/A321 
Nondestructive Testing Manual, Revision 89, dated August 1, 2011.
(v) Task 57-29-04-270-801-A-01, Gear Rib Forward Lug Attachment for 
the Main Gear Before Modification 32025J2211, of Subject 57-29-04, 
Inspection of the Gear Rib Forward and Aft Lug Attachment for the 
Main Gear, of Chapter 57, Wings, of the Airbus A318/A319/A320/A321 
Nondestructive Testing Manual, Revision 89, dated August 1, 2011.

    (4) The following service information was approved for IBR on 
May 19, 2008 (73 FR 19975, April 14, 2008):
    (i) Airbus Service Bulletin A320-57-1138, Revision 01, dated 
October 27, 2006.
    (ii) Reserved.
    (5) For Airbus service information identified in this AD, 
contact Airbus, Airworthiness Office--EIAS, 1 Rond Point Maurice 
Bellonte, 31707 Blagnac Cedex, France; telephone +33 5 61 93 36 96; 
fax +33 5 61 93 44 51; email: [email protected]; 
Internet http://www.airbus.com.
    (6) You may view this service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For 
information on the availability of this material at the FAA, call 
425-227-1221.
    (7) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.


    Issued in Renton, Washington, on December 26, 2013.
John P. Piccola,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2014-04954 Filed 3-27-14; 8:45 am]
BILLING CODE 4910-13-P