[Federal Register Volume 71, Number 152 (Tuesday, August 8, 2006)]
[Proposed Rules]
[Pages 44937-44943]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-12834]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-NM-381-AD]
RIN 2120-AA64


Airworthiness Directives; Airbus Model A330-200, A330-300, A340-
200, and A340-300 Series Airplanes

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

ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of 
comment period.

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SUMMARY: This document revises an earlier proposed airworthiness 
directive (AD), applicable to all Airbus Model A330, A340-200, and 
A340-300 series airplanes. The original NPRM would have required 
repetitive inspections for discrepancies of the grease and gear teeth 
of the radial variable differential transducer of the nose wheel 
steering gearbox; or repetitive inspections for damage of the chrome on 
the bearing surface of the nose landing gear (NLG) main fitting barrel; 
as applicable. And, for airplanes with any discrepancy or damage, the 
original NPRM would have required an additional inspection or

[[Page 44938]]

corrective actions. This new action revises the proposed rule by adding 
a terminating action and removing certain airplanes from the 
applicability. The actions specified by this new proposed AD are 
intended to prevent incorrect operation or jamming of the nose wheel 
steering, which could cause reduced controllability of the airplane on 
the ground. This action is intended to address the identified unsafe 
condition.

DATES: Comments must be received by September 5, 2006.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-114, 
Attention: Rules Docket No. 2001-NM-381-AD, 1601 Lind Avenue, SW., 
Renton, Washington 98057-3356. Comments may be inspected at this 
location between 9 a.m. and 3 p.m., Monday through Friday, except 
Federal holidays. Comments may be submitted via fax to (425) 227-1232. 
Comments may also be sent via the Internet using the following address: 
[email protected]. Comments sent via fax or the Internet must 
contain ``Docket No. 2001-NM-381-AD'' in the subject line and need not 
be submitted in triplicate. Comments sent via the Internet as attached 
electronic files must be formatted in Microsoft Word 97 or 2000 or 
ASCII text.
    For the service information referenced in the proposed rule, 
contact Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, 
France. This information may be examined at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue, SW., Renton, Washington.

FOR FURTHER INFORMATION CONTACT: Tim Backman, Aerospace Engineer, 
International Branch, ANM-116, FAA, Transport Airplane Directorate, 
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 
227-2797; fax (425) 227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications shall identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this action may be changed in 
light of the comments received.

Submit Comments Using the Following Format

     Organize comments issue-by-issue. For example, discuss a 
request to change the compliance time and a request to change the 
service bulletin reference as two separate issues.
     For each issue, state what specific change to the proposed 
AD is being requested.
     Include justification (e.g., reasons or data) for each 
request.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report summarizing each FAA-public contact concerned with 
the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their comments 
submitted in response to this action must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 2001-NM-381-AD.'' The postcard will be date stamped 
and returned to the commenter.

Availability of NPRMs

    Any person may obtain a copy of this NPRM by submitting a request 
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules 
Docket No. 2001-NM-381-AD, 1601 Lind Avenue, SW., Renton, Washington 
98055-4056.

Discussion

    A proposal to amend part 39 of the Federal Aviation Regulations (14 
CFR part 39) to add an airworthiness directive (AD), applicable to all 
Airbus Model A330, A340-200, and A340-300 series airplanes, was 
published as a notice of proposed rulemaking (NPRM) in the Federal 
Register on June 16, 2004 (69 FR 33592). That original NPRM would have 
required repetitive detailed inspections for discrepancies of the 
grease and gear teeth of the radial variable differential transducer 
(RVDT) of the nose wheel steering (NWS) gearbox; or repetitive detailed 
inspections for damage of the chrome on the bearing surface of the nose 
landing gear (NLG) main fitting barrel; as applicable. For airplanes 
with any discrepancy or damage, the original NPRM would have required 
an additional inspection or corrective actions.
    The original NPRM was prompted by a report from the Direction 
G[eacute]n[eacute]rale de l'Aviation Civile (DGAC), which is the 
airworthiness authority for France, of the failure of the NWS system on 
a Model A340 airplane. Problems associated with this failure, if not 
corrected, could result in incorrect operation or jamming of the NWS, 
and reduced controllability of the airplane on the ground.

Actions Since Issuance of Previous Proposal

    The original NPRM was intended to address the unsafe condition 
identified in French airworthiness directives 2001-503(B) and 2001-
504(B). Since we issued that NPRM, the DGAC has cancelled those 
airworthiness directives and issued new rulemaking on this subject to 
add a terminating action and remove airplanes modified in production.

Explanation of New Service Information

    Airbus has issued the following Airbus service bulletins:

                                                Service Bulletins
----------------------------------------------------------------------------------------------------------------
                                                                                         Messier-Dowty service
              Action                  Airbus service bulletin      Airplane models      bulletins referred to in
                                                                                        Airbus service bulletins
----------------------------------------------------------------------------------------------------------------
Repetitive inspections............  A330-32-3134, Revision 03,  A330-200 and -300      Special Inspection
                                     dated May 11, 2005, and     series airplanes.      Service Bulletins D23285-
                                     Revision 04, dated April                           32-037, Revision 2,
                                     3, 2006.                                           dated May 23, 2002; and
                                                                                        D23285-32-044, dated
                                                                                        January 12, 2004.
                                    A340-32-4172, Revision 03,  A340-200 and -300      Special Inspection
                                     dated May 11, 2005, and     series airplanes.      Service Bulletins D23285-
                                     Revision 04, dated April                           32-037, Revision 2,
                                     3, 2006.                                           dated May 23, 2002; and
                                                                                        D23285-32-044, dated
                                                                                        January 12, 2004.

[[Page 44939]]

 
Modification......................  A330-32-3164, dated June    A330-200 and -300      Service Bulletin D23285-
                                     27, 2003, and Revision      series airplanes.      32-042, dated June 19,
                                     01, dated March 21, 2006.                          2003.
                                    A340-32-4204, dated June    A340-200 and -300      Service Bulletin D23285-
                                     27, 2003, and Revision      series airplanes.      32-042, dated June 19,
                                     01, dated March 21, 2006.                          2003.
Modification......................  A330-32-3192, dated         A330-200 and -300      Service Bulletin D23581-
                                     December 8, 2005.           series airplanes.      32-047, dated December
                                                                                        1, 2005.
                                    A340-32-4227, dated         A340-200 and -300      Service Bulletin D23581-
                                     December 8, 2005.           series airplanes.      32-047, dated December
                                                                                        1, 2005.
----------------------------------------------------------------------------------------------------------------

    Service Bulletins A330-32-3134 and A340-32-4172, both Revision 02, 
both dated August 8, 2003, were described in the original NPRM. 
Revisions 03 and 04 of these service bulletins provides minor changes 
only; the procedures remain essentially unchanged.
    Service Bulletins A330-32-3164 and A340-32-4204 describe an 
inspection to identify the suffix number on the NLG leg assembly. For 
affected leg assemblies, the service bulletins also describe procedures 
for a modification that will improve the sealing between the RVDT 
gearboxes and the NLG steering collar to help prevent contamination of 
the RVDT gearboxes and the NLG main fitting. The modification involves 
replacing the RVDT drive gear ring and the housing of the NLG steering 
gear ring.
    Service Bulletins A330-32-3192 and A340-32-4227 describe an 
inspection to identify the suffix number on the NLG leg assemblies. For 
affected leg assemblies, the service bulletins also describe procedures 
for an NLG modification that will reduce wear and damage of the 
reinforced NLG steering collar and NLG main fitting. The modification 
involves adding two grease points and new bushes with revised grease 
paths, which will allow better grease distribution into the steering 
collar assembly. The modification also involves increasing the internal 
diameter tolerances of the steering collar, which will reduce the risk 
of contact between the steering collar and the main fitting at low 
temperature.
    Accomplishing both modifications described in Airbus Service 
Bulletins A330-32-3164, A340-32-4204, A330-32-3192, and A340-32-4227, 
as applicable, eliminates the need for the repetitive inspections.
    Accomplishing the actions specified in the service information 
described above is intended to adequately address the unsafe condition. 
The DGAC mandated the service information and issued French 
airworthiness directives F-2005-209 and F-2005-210, both dated December 
21, 2005, to ensure the continued airworthiness of these airplanes in 
France.

FAA's Determination

    In light of the DGAC's new rulemaking and the corresponding revised 
service bulletins described above, we have revised the supplemental 
NPRM to refer to the new information.

Comments

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the comments received.

Support for the Proposed AD

    One commenter, U.S. Airways, supports the original NPRM and the 
flexibility it offers in allowing operators the option of either 
inspecting the bearing surface or analyzing a grease sample. The 
commenter observes that this flexibility will allow operators to choose 
the inspection method and interval that best suit their maintenance 
schedules.

Request To Clarify Inspection Conditions

    Paragraphs (b), (c), and (d) of the original NPRM specify 
inspection requirements and compliance times based on accomplishment of 
Airbus Modification 51381. The procedures for the modification are 
described in Airbus Service Bulletins A330-32-3164 and A340-32-4204. 
One commenter, Airbus, suggests that identifying those service 
bulletins in the AD would help operators define the configuration of 
their airplanes to determine the relevant inspections.
    We infer that Airbus is requesting that we exclude from the AD 
applicability those airplanes on which the modification service 
bulletins have been accomplished in service. We disagree with the 
request. Although the applicability of French airworthiness directives 
F-2005-209 and F-2005-210 excludes airplanes on which Airbus Service 
Bulletins A340-32-4204 and A330-32-3164 (as well as A340-32-4227 and 
A330-32-3192) were done in service, the applicability of this 
supplemental NPRM does not exclude those airplanes. This supplemental 
NPRM would instead require the applicable modification(s) for airplanes 
with affected NLG leg assemblies, as specified in those service 
bulletins. This requirement would ensure that the applicable actions 
specified in the service bulletins and proposed in this supplemental 
NPRM are accomplished for all affected airplanes.

Request To Revise Inspection Requirement for Certain Conditions

    Paragraph (d)(1) of the original NPRM specifies detailed 
inspections for discrepancies of the grease and gear teeth. One 
commenter, Airbus, states that operators cannot do a detailed 
inspection, as that term is defined in the original NPRM, of the grease 
because the associated service information instead specifies that the 
grease sample be sent to a laboratory for analysis. (This procedure is 
described in the secondary service bulletin, Messier-Dowty Special 
Inspection Service Bulletin D23285-32-037, for airplanes without Airbus 
Modification 51381 installed in production.) The commenter requests 
that we revise paragraph (d)(1) of the original NPRM to require a 
detailed inspection only of the gear teeth, which would be in line with 
the wording and instructions of the applicable service bulletins.
    Another commenter, Northwest Airlines, requests that we revise the 
original NPRM to clarify that it would require only a detailed 
inspection --not a lab analysis--of the grease.
    We partially agree. We agree that the inspection of the grease and 
the inspection of the gear teeth are different types of actions. And we 
agree with Airbus that a detailed inspection of the grease is not the 
appropriate terminology. But paragraph 2.B. of the Accomplishment 
Instructions of Messier-Dowty Special Inspection Service Bulletin 
D23285-32-037

[[Page 44940]]

specifies a grease ``inspection,'' which involves an analysis of the 
grease by sending grease samples to a lab for inspection and 
determination of further actions. We have revised the proposed 
requirement (paragraph (a)(1) in this supplemental NPRM) to distinguish 
an ``inspection'' of the grease (sending the grease to a laboratory for 
analysis) from a ``detailed inspection'' of the gear teeth. We disagree 
with Northwest Airlines' request to clarify that only a detailed 
inspection is required. As previously discussed, the AD requires two 
separate actions: A detailed inspection of the gear teeth and an 
inspection of the grease. The grease inspection specified in the 
Accomplishment Instructions involves analysis of the grease sample 
either by Messier-Dowty or another lab. We have not changed the final 
rule regarding this issue.

Request To Cite Latest Service Information

    One commenter, Northwest Airlines, requests that we revise the 
original NPRM to refer to the latest revision of Messier-Dowty Special 
Inspection Service Bulletin D23285-32-037, which is Revision 2, dated 
May 23, 2002.
    As revised, the service bulletin provides for the grease analysis 
to be done at a lab chosen by the operator; however, a reporting form 
with results must be returned to Messier-Dowty. Likewise, this 
supplemental NPRM would provide for the option that the grease analysis 
be done at a lab chosen by the operator with the results to be 
evaluated by Messier-Dowty. Note 2 in this supplemental NPRM refers to 
Revision 2 of the service bulletin.

Request To Define Allowable Grease Particle Content

    One commenter, U.S. Airways, which operates Model A330 airplanes, 
notes that there are no allowable limits for the grease particle 
content provided in Airbus Service Bulletin A330-32-3134 or Messier-
Dowty Special Inspection Service Bulletin D23285-32-037. The original 
NPRM would allow only Messier-Dowty to do the grease sample analysis. 
The commenter requests that we revise the original NPRM to define 
acceptable grease particle content and permit operators to use 
alternative lab facilities to analyze the grease.
    We partially agree with the requests. As stated previously, 
Messier-Dowty Special Inspection Service Bulletin D23285-32-037 was 
revised to provide for the grease analysis to be done at a lab chosen 
by the operator. However, the criteria for acceptable grease particle 
content are complex and not appropriate to include in this supplemental 
NPRM. The grease analysis process includes establishing reference 
spectra for new grease samples, establishing the spectra for each 
grease sample taken, comparing the sample spectra to the reference, and 
identifying polluting agents. The allowable pollutant constituents, 
their allowable size and weights, and specification of the acceptable 
ranges for constituent concentrations of the grease when compared to 
the reference would greatly increase the complexity of this 
supplemental NPRM. Therefore, we have determined that it is necessary 
for operators to send the results to Messier-Dowty for evaluation.

Request To Revise Compliance Time for Analysis

    As stated previously, Messier-Dowty Special Inspection Service 
Bulletin D23285-32-037 specifies sending grease samples to Messier-
Dowty for analysis. If the grease sample analysis indicates any 
discrepancy, paragraph (d)(1) of the original NPRM would require a 
detailed inspection of the bearing surface within 3 months. One 
commenter, U.S. Airways, questions whether the 3-month period should be 
counted from the day the grease sample was taken or the day the results 
were provided to the operator. The commenter requests that we revise 
the original NPRM to specifically require the bearing surface 
inspection within 3 months after Messier-Dowty advises operators of 
discrepant results. According to the commenter, this suggested 
compliance time would avoid problems associated with the possible lag 
time between the time the operator sends a sample to the manufacturer 
and the time the operator receives the results. If an extended time is 
required for the analysis, operators may be required to inspect the 
bearing surface without adequate planning time.
    We do not agree with the request. We have determined that the 
bearing surface must be inspected within 3 months after the initial 
inspections of the grease and teeth. However, as previously stated, 
operators have their option of laboratories for the grease analysis, 
which could effectively lessen the impact on Messier-Dowty and decrease 
the lag time between submitting samples and receiving results. In 
addition, operators may request an extension of this time, in 
accordance with paragraph (j) of this supplemental NPRM, if data are 
supplied that will ensure the continued operational safety of the fleet 
pending receipt of the lab analysis. We have not changed this proposed 
requirement (paragraph (a)(1) in this supplemental NPRM).

Request To Clarify Inspection Requirements

    One commenter, Airbus, considers that paragraph (e) of the original 
NPRM could be interpreted as requiring the same type of inspection at 
each interval. The commenter notes that Airbus Service Bulletins A330-
32-3134 and A340-32-4172 offer operators the option of inspecting 
either the grease and gear teeth or the chrome on the bearing surface 
of the NLG main fitting barrel under the NWS rotating sleeve at the 
next inspection, within the applicable compliance times. The commenter 
requests that we clarify the repetitive inspection requirement.
    We agree that clarification is necessary. For each subsequent 
repetitive inspection, operators have the option of doing either 
inspection--regardless of the most recent inspection type performed, 
provided subsequent inspections are done within the specified 
intervals. The revisions in paragraph (c) in this supplemental NPRM are 
intended to clarify this issue.

Request To Clarify Inspection Compliance Time

    One commenter, Northwest Airlines, requests that we clarify the 
compliance times for the initial inspection in the original NPRM. The 
commenter suggests the following language: ``If the NLG is more than 5 
years old (since new or overhauled), accomplish the inspection within 
700 flight hours of the effective date of the AD.'' The commenter 
states that this will agree with Airbus Service Bulletin A330-32-3134.
    We do not agree. The commenter's requested change would allow 
additional time for some airplanes. We have determined that the 
compliance times, as proposed, will ensure an acceptable level of 
safety. We have not changed this supplemental NPRM regarding this 
issue.

Request To Revise Cost Estimate

    The Cost Impact section of the original NPRM states that the chrome 
inspection (on the bearing surface under the rotating sleeve) would 
take about 2 work hours, and the grease and gear teeth inspection (on 
the RVDT ring) would take about 8 work hours. One commenter, Northwest 
Airlines, states that these estimates do not agree with those specified 
in the service information:
     For the chrome inspection, Airbus Service Bulletin A330-
32-3134 specifies 17 work hours to inspect, including 9 hours to 
prepare, test, and close up; and Messier-Dowty Service Bulletin D23285-
32-037 specifies 8

[[Page 44941]]

work hours to inspect the bearing surface.
     For the grease inspection, Airbus Service Bulletin A330-
32-3134 (and A340-32-4172) specifies 10 work hours to inspect, 
including 8 hours to prepare, test, and close up; and Messier-Dowty 
Service Bulletin D23285-32-037 specifies 2 work hours to inspect the 
grease and gear teeth.
    The commenter states that the differences between the work hours 
for actual and incidental tasks will significantly affect the planning 
and scheduling of these inspection tasks.
    We partially agree with the commenter's interepretation of the 
service bulletin labor estimates. We have included work hours for post-
inspection test preparation and tests. The cost estimates provided in 
the original NPRM generally reflect only the direct costs of the 
specific required actions based on the best data available from the 
manufacturer. We recognize that operators may incur incidental costs 
(such as the time for planning, access and close, and associated 
administrative actions) in addition to the direct costs. The cost 
analysis in ADs, however, typically does not include incidental costs. 
The compliance times in this supplemental NPRM should allow ample time 
for operators to do the required actions at the same time as scheduled 
major airplane inspection and maintenance activities, which would 
reduce the additional time and costs associated with special 
scheduling.

Additional Changes to Original NPRM

    1. We have revised the applicability of the original NPRM to 
identify model designations as published in the most recent type 
certificate data sheet for the affected models. Although Model A330-302 
and -303 airplanes have not yet been type certificated, FAA approval of 
these models is in process. We have changed the applicability in this 
supplemental NPRM to more closely parallel the effectivity section of 
the French airworthiness directives; the revised reference to Model 
A330 airplanes includes Model A330-302 and -303 airplanes.
    2. We revised the inspection requirements to distinguish airplanes 
by configuration. Paragraphs (a) through (c) in this supplemental NPRM 
apply to airplanes without Airbus Modification 51381. Paragraph (d) in 
this supplemental NPRM applies to airplanes with the modification.
    3. We have revised this action to clarify the appropriate procedure 
for notifying the principal inspector before using any approved AMOC on 
any airplane to which the AMOC applies.
    4. After we issued the original NPRM, we reviewed the figures we 
have used over the past several years to calculate AD costs to 
operators. To account for various inflationary costs in the airline 
industry, we find it necessary to increase the labor rate used in these 
calculations from $65 per work hour to $80 per work hour. The cost 
impact information, below, reflects this increase in the specified 
hourly labor rate.

Conclusion

    Since certain changes expand the scope of the originally proposed 
rule, the FAA has determined that it is necessary to reopen the comment 
period to provide additional opportunity for public comment.

Cost Impact

    The following table provides the estimated costs for U.S. operators 
to comply with this supplemental NPRM.

                                                                     Estimated Costs
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                     Number of
                                                      Average                                                          U.S.-
                Action                  Work hours   labor rate            Parts              Cost per airplane      registered         Fleet cost
                                                      per hour                                                       airplanes
--------------------------------------------------------------------------------------------------------------------------------------------------------
RVDT inspection, per inspection cycle            6          $80  None....................  $480...................           11  $5,280.
Chrome inspection, per inspection               13           80  None....................  $1,040.................           15  15,600.
 cycle.
Modification (Service Bulletin A330-            15           80  10,244 to $11,337.......  $11,444 to $12,537.....           12  137,328 to $150,444.
 32-3164 or A340-32-4204).
Rotating sleeve grease system                   15           80  Unknown.................  From $1,200............           23  From $27,600.
 modification (Service Bulletin A330-
 32-3192 or A340-32-4227).
--------------------------------------------------------------------------------------------------------------------------------------------------------

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 Impact

    The regulations proposed herein would 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. Therefore, it 
is determined that this proposal would not have federalism implications 
under Executive Order 13132.
    For the reasons discussed above, I certify that this proposed 
regulation (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); 
and (3) if promulgated, 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. A copy of the draft 
regulatory evaluation prepared for this action is contained in the 
Rules Docket. A copy of it may be obtained by contacting the Rules 
Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration proposes to amend 
part

[[Page 44942]]

39 of the Federal Aviation Regulations (14 CFR part 39) as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    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]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

Airbus: Docket 2001-NM-381-AD.

    Applicability: The following airplanes, certificated in any 
category, except those modified in production by both Airbus 
Modifications 51381 and 53073:

Model A330-201, -202, -203, -223, and -243 airplanes
Model A330-301, -302, -303, -321, -322, -323, -341, -342, and -343 
airplanes
Model A340-211, -212, and -213 airplanes
Model A340-311, -312, and -313 airplanes

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent incorrect operation or jamming of the nose wheel 
steering (NWS), which could cause reduced controllability of the 
airplane on the ground, accomplish the following:

Inspections: Airplanes Without Modification 51381

    (a) For airplanes that were not modified in production by Airbus 
Modification 51381: Do the inspection specified in either paragraph 
(a)(1) or (a)(2) of this AD, in accordance with the required service 
bulletin identified in Table 1 of this AD, as applicable. The 
required compliance time is specified in paragraph (b) of this AD.
    (1) Inspect for discrepancies of the grease by sending it to a 
laboratory for analysis, and do a detailed inspection for 
discrepancies of the gear teeth of the radial variable differential 
transducer (RVDT) driving ring and the gears in the RVDT gearboxes. 
If there are no discrepancies (such as metallic particles in the 
grease, abnormal wear of the gear teeth, or missing rubber sealant 
at the mating face between the main fitting and the RVDT gearbox), 
repeat the inspection as specified in paragraph (c) of this AD. If 
there is any discrepancy, do the inspection in paragraph (a)(2) of 
this AD within 3 months after the inspection specified in paragraph 
(a)(1) of this AD.
    (2) Do a detailed inspection for damage of the chrome on the 
bearing surface of the nose landing gear (NLG) main fitting barrel 
under the NWS rotating sleeve. If there is no damage (such as 
flaking, corrosion, or blistering), repeat the inspection as 
specified in paragraph (c) of this AD. If there is any damage, 
before further flight, do the corrective action in paragraph (e) of 
this AD.

    Note 1: For the purposes of this AD, a detailed inspection is 
defined as: ``An intensive visual examination of a specific 
structural area, system, installation, or assembly to detect damage, 
failure, or irregularity. Available lighting is normally 
supplemented with a direct source of good lighting at intensity 
deemed appropriate by the inspector. Inspection aids such as mirror, 
magnifying lenses, etc., may be used. Surface cleaning and elaborate 
access procedures may be required.''


                                     Table 1.--Inspection Service Bulletins
----------------------------------------------------------------------------------------------------------------
                                                                                         Approved revision level
                                                                                            (for actions done
           Airplane models             Airbus service bulletin  Required revision level    before the effective
                                                                                             date of the AD)
----------------------------------------------------------------------------------------------------------------
A330-200 and A330-300 series           A330-32-3134...........  Revision 04, dated       Original, dated
 airplanes.                                                      April 3, 2006.           September 11, 2001.
                                                                                         Revision 01, dated
                                                                                          November 29, 2001.
                                                                                         Revision 02, dated
                                                                                          August 8, 2003.
                                                                                         Revision 03, dated May
                                                                                          11, 2005.
A340-200 and A330-300 series           A340-32-4172...........  Revision 04, dated       Original, dated
 airplanes.                                                      April 3, 2006.           September 11, 2001.
                                                                                         Revision 01, dated
                                                                                          November 29, 2001.
                                                                                         Revision 02, dated
                                                                                          August 8, 2003.
                                                                                         Revision 03, dated May
                                                                                          11, 2005.
----------------------------------------------------------------------------------------------------------------

    (b) For airplanes identified in paragraph (a) of this AD: Do the 
initial inspection specified in paragraph (a) of this AD at the 
latest of the following times:
    (1) Within 60 months after the date that the new NLG was 
installed on the airplane.
    (2) Within 60 months after the last major NLG overhaul 
accomplished before the effective date of this AD.
    (3) Within 700 flight hours after the effective date of this AD.
    (c) For airplanes identified in paragraph (a) of this AD: Repeat 
either inspection specified in paragraph (a)(1) or (a)(2) of this AD 
at intervals not to exceed the applicable interval specified in 
paragraph (c)(1) or (c)(2) of this AD, until the requirements of 
paragraph (g) of this AD are done.
    (1) If the most recent inspection was the inspection specified 
in paragraph (a)(1) of this AD, then the next inspection must be 
done within 8 months.
    (2) If the most recent inspection was the inspection specified 
in paragraph (a)(2) of this AD, then the next inspection must be 
done within 18 months.

Repetitive Inspections: Airplanes With Modification 51381

    (d) For airplanes modified in production by Airbus Modification 
51381: Perform a detailed inspection for damage of the chrome on the 
bearing surface of the nose landing gear (NLG) main fitting barrel 
under the NWS rotating sleeve. Do the inspection at the later of the 
times specified in paragraphs (d)(1) and (d)(2) of this AD in 
accordance with the applicable required service bulletin identified 
in Table 1 of this AD. Repeat the inspection thereafter at intervals 
not to exceed 18 months, until the requirements of paragraph (g) of 
this AD have been done.
    (1) Within 60 months after the date that the new NLG was 
installed on the airplane.
    (2) Within 60 months after the last major NLG overhaul 
accomplished before the effective date of this AD.

Follow-On Investigative and Corrective Actions

    (e) For all airplanes: If any damage or discrepancy is found 
during any inspection required by this AD, do the corrective action 
before further flight in accordance with the applicable required 
Airbus service bulletin identified in Table 1 of this AD, with the 
following exceptions:
    (1) If discrepancies are found during any inspection specified 
in paragraph (a)(1) of this AD, the inspection in paragraph (a)(2) 
of this AD is required within 3 months.
    (2) Where the service bulletin recommends contacting Messier-
Dowty for appropriate action: Repair before further flight in 
accordance with a method approved by either the Manager, 
International Branch, ANM-116, FAA, Transport Airplane Directorate; 
or the Direction Generale de l'Aviation Civile (DGAC) (or its 
delegated agent).

    Note 2: Airbus Service Bulletins A330-32-3134 and A340-32-4172 
refer to Messier-

[[Page 44943]]

Dowty Special Inspection Service Bulletins D23285-32-037, Revision 
2, dated May 23, 2002; and D23285-32-044, dated January 12, 2004; as 
additional sources of service information for the inspections.

Credit for Prior Accomplishment

    (f) Actions done before the effective date of this AD in 
accordance with an applicable Approved Revision Level of the service 
bulletin identified in Table 1 of this AD are acceptable for 
compliance with the corresponding requirements of paragraphs (a), 
(d), and (e) of this AD.

Modification

    (g) For all airplanes: At the applicable time specified in 
paragraph (g)(1) or (g)(2) of this AD, modify the NLG as specified 
in Table 2 of this AD, as applicable.
    (1) For NLGs overhauled before the effective date of this AD: At 
the later of the times specified in paragraphs (g)(1)(i) and 
(g)(1)(ii) of this AD:
    (i) Within 60 months since the NLG was overhauled or 180 months 
since the NLG was new, whichever occurs first.
    (ii) Within 6 months after the effective date of this AD.
    (2) For NLGs not overhauled before the effective date of this 
AD: Within 120 months since the NLG was new, or within 6 months 
after the effective date of this AD, whichever occurs later.

                         Table 2.--Modification
------------------------------------------------------------------------
                                           Modify the NLG in accordance
            For airplanes--                           with--
------------------------------------------------------------------------
Without Airbus Modifications 51381 and   Both Airbus Service Bulletins
 53073 done in production.                A330-32-3164, dated June 27,
                                          2003, or Revision 1, dated
                                          March 21, 2006; and A330-32-
                                          3192, dated December 8, 2005;
                                         Or both Airbus Service
                                          Bulletins A340-32-4204, dated
                                          June 27, 2003, or Revision 1,
                                          dated March 21, 2006; and A340-
                                          32-4227, dated December 8,
                                          2005.
With Airbus Modification 51381 but not   Airbus Service Bulletin A330-32-
 Airbus Modification 53073 done in        3192, dated December 8, 2005;
 production.                              or A340-32-4227, dated
                                          December 8, 2005.
With Airbus Modification 53073 but not   Airbus Service Bulletin A330-32-
 Airbus Modification 51381 done in        3164, dated June 27, 2003, or
 production.                              Revision 01, dated March 21,
                                          2006; or A340-32-4204, dated
                                          June 27, 2003, or Revision 01,
                                          dated March 21, 2006.
------------------------------------------------------------------------

Terminating Action

    (h) Accomplishment of both NLG modifications specified in 
paragraph (g) of this AD terminates the repetitive inspection 
requirements of this AD.

    Note 3: Airbus Service Bulletins A330-32-3164 and A340-32-4204 
refer to Messier-Dowty Service Bulletin D23285-32-042, dated June 
19, 2003, as an additional source of service information for the 
modification.


    Note 4: Airbus Service Bulletins A330-32-3192 and A340-32-4227 
refer to Messier-Dowty Service Bulletin D23581-32-047, dated 
December 1, 2005, as an additional source of service information for 
the modification.

Reporting

    (i) Certain service bulletins specify to submit a report to the 
manufacturer. This AD does not require a report, unless the grease 
analysis required by paragraph (a)(1) of this AD is done at a lab 
chosen by the operator, which requires the results to be evaluated 
by Messier-Dowty.

Alternative Methods of Compliance

    (j)(1) In accordance with 14 CFR 39.19, the Manager, 
International Branch, ANM-116, is authorized to approve alternative 
methods of compliance for this AD.
    (2) Before using any AMOC approved in accordance with 14 CFR 
39.19 on any airplane to which the AMOC applies, notify the 
appropriate principal inspector in the FAA Flight Standards 
Certificate Holding District Office.

    Note 5: The subject of this AD is addressed in French 
airworthiness directives F-2005-209 and F-2005-210, both dated 
December 21, 2005.


    Issued in Renton, Washington, on July 31, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E6-12834 Filed 8-7-06; 8:45 am]
BILLING CODE 4910-13-P