[Federal Register Volume 81, Number 168 (Tuesday, August 30, 2016)]
[Proposed Rules]
[Pages 59535-59539]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-20681]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2016-8849; Directorate Identifier 2015-NM-174-AD]
RIN 2120-AA64


Airworthiness Directives; Airbus Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for all 
Airbus Model A330-223F, -223, -321, -322, and -323 airplanes. The 
proposed AD was prompted by fatigue load analysis that determined the 
need for certain reduced inspection intervals and updated torque values 
of the forward mount pylon bolts. This proposed AD would require 
repetitive torque checks to determine if there are any loose or broken 
forward engine mount bolts, and, if necessary, replacement of all four 
forward engine mount bolts and associated nuts, inspection of the 
forward mount assembly, and repair. We are proposing this AD to detect 
and correct loose or broken bolts, which could lead to engine 
detachment in flight, and damage to the airplane.

DATES: We must receive comments on this proposed AD by October 14, 
2016.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE., Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact Airbus 
SAS, Airworthiness Office--EAL, 1 Rond Point Maurice Bellonte, 31707 
Blagnac Cedex, France; telephone: +33 5 61 93 36 96; fax: +33 5 61 93 
45 80; 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

[[Page 59536]]

the availability of this material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2016-
8849; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this proposed 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. Comments will be available in the AD docket shortly after 
receipt.

FOR FURTHER INFORMATION CONTACT: Vladimir Ulyanov, Aerospace Engineer, 
International Branch, ANM-116, Transport Airplane Directorate, FAA, 
1601 Lind Avenue SW., Renton, WA 98057-3356; telephone: 425-227-1138; 
fax: 425-227-1149.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2016-8849; 
Directorate Identifier 2015-NM-174-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    On June 21, 2013, we issued AD 2013-14-04, Amendment 39-17509 (78 
FR 68352, November 14, 2013) (``AD 2013-14-04''). AD 2013-14-04 
requires actions intended to address the unsafe condition identified in 
this NPRM on all Airbus Model A330-223F, -223, -321, -322, and -323 
airplanes.
    Since we issued AD 2013-14-04, we have determined that it is 
necessary to update the torque values of the forward mount pylon bolts.
    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA AD 
2015-0214, dated October 19, 2015 (referred to after this as the 
Mandatory Continuing Airworthiness Information, or ``the MCAI''), to 
correct an unsafe condition for all Airbus Model A330-223F, -223, -321, 
-322, and -323 airplanes. The MCAI states:

    The forward mount engine pylon bolts, Part Number (P/N) 51U615, 
fitted on Airbus A330 aeroplanes with Pratt & Whitney (PW) PW4000 
engines, are made from MP159 material. Analysis made by PW 
identified that MP159 material pylon bolts do not meet the full life 
cycle torque check interval requirement, in a bolt-out condition. 
Consequently, PW issued Alert Service Bulletin (ASB) PW4G-100-A71-
32, and the U.S. Federal Aviation Administration (FAA), as Engine 
Certification Authority, issued FAA AD 2006-16-05 [Amendment 39-
14705 (71 FR 44185, August 4, 2006) (``AD 2006-16-05'')] to require 
repetitive torque checks of MP159 material forward mount pylon bolts 
fitted on certain PW4000 series engines.
    However, the engine mount system is considered to be part of 
aeroplane certification rather than the engine certification. 
Following further fatigue load analysis by Airbus of the A330 engine 
mount system, it was determined that the torque check interval for 
MP159 material forward mount pylon bolts, as required by FAA AD 
2006-16-05 (2,700 flight cycles (FC)), provided an insufficient 
level of safety for Airbus A330 aeroplanes.
    This condition, if not detected and corrected, could ultimately 
lead to detachment of the engine from the aeroplane, possibly 
resulting in damage to the aeroplane and/or injury to persons on the 
ground.
    Consequently, EASA issued AD 2012-0094 [which corresponds to FAA 
AD 2013-14-04] to require accomplishment of repetitive torque checks 
of the forward mount pylon bolts installed on affected A330 
aeroplanes and, depending on findings, replacement of all four bolts 
and associated nuts, in accordance with PW ASB PW4G-100-A71-32 
Revision 01 and Airbus Service Bulletin (SB) A330-71-3028.
    Since that AD was issued, it has been concluded that a new 
torque value must be applied.
    Consequently, Airbus issued SB A330-71-3028 Revision 02 and PW 
issued ASB PW4G-100-A71-32 Revision 02 to update the torque value. 
Additional forward mount inspections are also provided in case of 
one or more forward engine mount bolts is found loose, broken or 
missing.
    For the reasons described above, this AD retains the 
requirements of EASA AD 2012-0094, which is superseded, introduces a 
new torque value, and requires additional inspections and, depending 
on findings, corrective action(s).

    Corrective actions include repetitive torque checks to determine if 
there are any loose or broken forward engine mount bolts on both 
engines, and, if necessary, replacement of all four forward engine 
mount bolts and associated nuts, inspection of the forward mount 
assembly, and repair. You may examine the MCAI in the AD docket on the 
Internet at http://www.regulations.gov by searching for and locating 
Docket No. FAA-2016-8849.

Related Service Information Under 1 CFR Part 51

    Airbus has issued Service Bulletin A330-71-3028, Revision 02, dated 
August 31, 2015. The service information describes procedures for 
repetitive torque checks to determine if there are any loose or broken 
forward engine mount bolts on both engines, replacement of all four 
forward engine mount bolts and associated nuts, and inspection of the 
forward mount assembly. This service information is reasonably 
available because the interested parties have access to it through 
their normal course of business or by the means identified in the 
ADDRESSES section.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

Costs of Compliance

    We estimate that this proposed AD affects 41 airplanes of U.S. 
registry.
    We also estimate that it would take about 3 work-hours per product 
to comply with the basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Required parts would cost about $6,747 
per product. Based on these figures, we estimate the cost of this 
proposed AD on U.S. operators to be $287,082, or $7,002 per product.
    In addition, we estimate that any necessary follow-on actions would 
take about 1 work-hour and require parts costing $6,747, for a cost of 
$6,832 per product. We have no way of determining the number of 
aircraft that might need these actions.

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:

[[Page 59537]]

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD 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.
    For the reasons discussed above, I certify 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);
    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.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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 adding the following new airworthiness 
directive (AD):

Airbus: Docket No. FAA-2016-8849; Directorate Identifier 2015-NM-
174-AD.

(a) Comments Due Date

    We must receive comments by October 14, 2016.

(b) Affected ADs

    This AD affects AD 2006-16-05, Amendment 39-14705 (71 FR 44185, 
August 4, 2006) (``AD 2006-16-05''); and AD 2013-14-04, Amendment 
39-17509 (78 FR 68352, November 14, 2013) (``AD 2013-14-04'').

(c) Applicability

    This AD applies to Airbus Model A330-223F, -223, -321, -322, and 
-323 airplanes, certificated in any category, all manufacturer 
serial numbers.

(d) Subject

    Air Transport Association (ATA) of America Code 71, Powerplant.

(e) Reason

    This AD was prompted by fatigue load analysis that determined 
the need for certain reduced inspection intervals and updated torque 
values of the forward mount pylon bolts. We are issuing this AD to 
detect and correct loose or broken bolts, which could lead to engine 
detachment in flight, and damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Torque Check and Replacement

    (1) At the applicable compliance time specified in table 1 to 
paragraph (g) of this AD, do a torque check to determine if there 
are any loose or broken forward engine mount bolts (4 positions/
engine) on both engines, in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A330-71-3028, Revision 02, 
dated August 31, 2015. Repeat the torque check at the applicable 
time intervals not to exceed the values specified in table 1 to 
paragraph (g) of this AD. For the purposes of this AD, the average 
flight time (AFT) is defined as a computation of the number of 
flight hours divided by the number of flight cycles accumulated 
since the most recent torque check or since the airplane's first 
flight, as applicable. Accomplishment of the initial torque check 
required by this AD terminates the requirements of AD 2013-14-05.

                                       Table 1 to Paragraph (g) of This AD
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                                          Flight cycles
                                        accumulated as of
                                      December 19, 2013 (the
                                       effective date of AD
                                       2013-14-04), either
                                     since last torque check                               Torque check interval
          Airplane models              specified in Pratt &         Compliance time           (not to exceed)
                                      Whitney Alert Service
                                      Bulletin PW4G-100-A71-
                                     32, or since airplane's
                                         first flight, as
                                            applicable
----------------------------------------------------------------------------------------------------------------
Model A330-321, -322, and -323       0-1,850................  Within 2,350 flight cycles   2,350 flight cycles
 airplanes with AFT more than 132                              since the last torque        or 24,320 flight
 minutes; and Model A330-223                                   check as specified in        hours, whichever
 airplanes.                                                    Pratt & Whitney Alert        occurs first.
                                                               Service Bulletin PW4G-100-
                                                               A71-32, or since
                                                               airplane's first flight,
                                                               as applicable.
Model A330-321, -322, and -323       1,851-2,700............  Within 500 flight cycles     2,350 flight cycles
 airplanes with AFT more than 132                              after December 19, 2013      or 24,320 flight
 minutes; and Model A330-223                                   (the effective date of AD    hours, whichever
 airplanes.                                                    2013-14-04), without         occurs first.
                                                               exceeding 2,700 flight
                                                               cycles since last torque
                                                               check as specified in
                                                               Pratt & Whitney Alert
                                                               Service Bulletin PW4G-100-
                                                               A71-32, or since
                                                               airplane's first flight,
                                                               as applicable; or within 3
                                                               months after December 19,
                                                               2013; whichever occurs
                                                               later.

[[Page 59538]]

 
Model A330-321, -322, and -323       0-1,450................  Within 1,950 flight cycles   1,950 flight cycles
 airplanes with AFT 132 minutes or                             since the last torque        or 20,210 flight
 less; and Model A330-321, -322,                               check performed as           hours, whichever
 and -323 airplanes on which the                               specified in Pratt &         occurs first.
 AFT is not calculated on a regular                            Whitney Alert Service
 basis.                                                        Bulletin PW4G-100-A71-32,
                                                               or since airplane's first
                                                               flight, as applicable.
Model A330-321, -322, and -323       1,451-2,700............  Within 500 flight cycles     1,950 flight cycles
 airplanes with AFT 132 minutes or                             after December 19, 2013      or 20,210 flight
 less; and Model A330-321,-322, and                            (the effective date of AD    hours, whichever
 -323 airplanes on which the AFT is                            2013-14-04), without         occurs first.
 not calculated on a regular basis.                            exceeding 2,700 flight
                                                               cycles since last torque
                                                               check performed as
                                                               specified in Pratt &
                                                               Whitney Alert Service
                                                               Bulletin PW4-100-A71-32,
                                                               or since airplane's first
                                                               flight, as applicable; or
                                                               within 3 months after
                                                               December 19, 2013;
                                                               whichever occurs later.
Model A330-223F airplanes..........  Any....................  Within 2,140 flight cycles   2,140 flight cycles
                                                               or 6,600 flight hours,       or 6,600 flight
                                                               whichever occurs first       hours, whichever
                                                               since the last torque        occurs first.
                                                               check performed as
                                                               specified in Pratt &
                                                               Whitney Alert Service
                                                               Bulletin PW4G-100-A71-32,
                                                               or since airplane's first
                                                               flight, as applicable.
----------------------------------------------------------------------------------------------------------------

    (2) If any loose or broken bolt is detected during the check 
required by paragraph (g)(1) of this AD, before further flight, do 
the actions specified by paragraphs (g)(2)(i) and (g)(2)(ii) of this 
AD, in accordance with the Accomplishment Instructions of Airbus 
Service Bulletin A330-71-3028, Revision 02, dated August 31, 2015; 
except, where the service information specifies to contact the 
manufacturer for further actions, this AD requires repair before 
further flight using a method approved by the Manager, International 
Branch, ANM-116, Transport Airplane Directorate, FAA; or the 
European Aviation Safety Agency (EASA); or Airbus's EASA Design 
Organization Approval (DOA).
    (i) Replace all four forward engine mount bolts and associated 
nuts, on the engine where the loose or broken bolt was detected, 
with new bolts and nuts.
    (ii) Do nondestructive inspections of the forward mount assembly 
for damage including cracks, dents, nicks, and scratches, and do all 
applicable corrective actions.
    (3) Replacement of bolts and nuts as required by paragraph 
(g)(2)(i) of this AD is not terminating action for the repetitive 
torque checks required by paragraph (g)(1) of this AD.

(h) Provisions for Compliance With AD 2006-16-05

    Accomplishment of the actions required by paragraph (g) of this 
AD constitutes compliance with the requirements specified in 
paragraph (g) of AD 2006-16-05.

(i) Parts Installation Prohibition

    As of December 19, 2013 (the effective date of AD 2013-14-04), 
no person may install any INCO718 material, forward mount pylon bolt 
having Pratt & Whitney part number 54T670 on any airplane.

(j) Credit for Previous Actions

    This paragraph provides credit for the actions required by 
paragraphs (g)(1) and (g)(2)(i) of this AD, if those actions were 
performed before the effective date of this AD using Airbus Service 
Bulletin A330-71-3028, dated December 16, 2011, or Airbus Service 
Bulletin A330-71-3028, Revision 01, dated February 20, 2012. This 
service information is not incorporated by reference in this AD.

(k) 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: Vladimir 
Ulyanov, Aerospace Engineer, International Branch, ANM-116, 
Transport Airplane Directorate, FAA, 1601 Lind Avenue SW., Renton, 
WA 98057-3356; telephone: 425-227-1138; 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.
    (2) Contacting the Manufacturer: As of the effective date of 
this AD, for any requirement in this AD to obtain corrective actions 
from a manufacturer, the action must be accomplished using a method 
approved by the Manager, International Branch, ANM-116, Transport 
Airplane Directorate, FAA; or EASA; or Airbus's EASA Design 
Organization Approval (DOA). If approved by the DOA, the approval 
must include the DOA-authorized signature.
    (3) Required for Compliance (RC): Except as required by 
paragraph (g)(2) of this AD: If any service information contains 
procedures or tests that are identified as RC, those procedures and 
tests must be done to comply with this AD; any procedures or tests 
that are not identified as RC are recommended. Those procedures and 
tests that are not identified as RC may be deviated from using 
accepted methods in accordance with the operator's maintenance or 
inspection program without obtaining approval of an AMOC, provided 
the procedures and tests identified as RC can be done and the 
airplane can be put back in an airworthy condition. Any 
substitutions or changes to procedures or tests identified as RC 
require approval of an AMOC.

(l) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) 2015-0214, dated October 19, 2015, for related information. 
This MCAI may be found in the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-
2016-8849.
    (2) For service information identified in this AD, contact 
Airbus SAS, Airworthiness Office--EAL, 1 Rond Point Maurice 
Bellonte, 31707 Blagnac Cedex, France; telephone: +33 5 61 93 36 96; 
fax: +33 5 61 93 45 80; email:

[[Page 59539]]

[email protected]; Internet: http://www.airbus.com. 
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.

    Issued in Renton, Washington, on August 18, 2016.
Dorr M. Anderson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-20681 Filed 8-29-16; 8:45 am]
 BILLING CODE 4910-13-P