Document ID: FAA-2017-0472-0004
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: Airbus Airplanes
Posted Date: 2017-08-28T04:00Z

[Federal Register Volume 82, Number 165 (Monday, August 28, 2017)]
[Rules and Regulations]
[Pages 40683-40686]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-17537]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0472; Product Identifier 2016-NM-148-AD; Amendment 
39-19002; AD 2017-17-12]
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 adopting a new airworthiness directive (AD) for all 
Airbus Model A310-203, -221, -222, -304, -322, -324, and -325 
airplanes. This AD was prompted by an evaluation by the design approval 
holder indicating that the wing bottom skin at the main landing gear 
(MLG) reinforcing plate is subject to widespread fatigue damage (WFD). 
This AD requires a modification of the wing bottom skin at the MLG 
reinforcing plate. We are issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective October 2, 2017.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of October 2, 
2017.

ADDRESSES: For service information identified in this final rule, 
contact Airbus SAS, Airworthiness Office--EAW, 1 Rond Point Maurice 
Bellonte, 31707 Blagnac Cedex, France; telephone +33 5 61 93 36 96; fax 
+33 5 61 93 44 51; email account.airworth-eas@airbus.com; Internet 
http://www.airbus.com. You may view this referenced service information 
at the FAA, Transport Standards Branch, 1601 Lind Avenue SW., Renton, 
WA. For information on the availability of this material at the FAA, 
call 425-227-1221. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2017-
0472.

[[Page 40684]]

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-2017-
0472; 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 AD, the regulatory evaluation, any comments received, and 
other information. The street address for the Docket Office (telephone 
800-647-5527) is Docket Management Facility, U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Dan Rodina, Aerospace Engineer, 
International Section, Transport Standards Branch, FAA, 1601 Lind 
Avenue SW., Renton, WA 98057-3356; telephone 425-227-2125; fax 425-227-
1149.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 by adding an AD that would apply to all Airbus Model A310-203, 
-221, -222, -304, -322, -324, and -325 airplanes. The NPRM published in 
the Federal Register on May 19, 2017 (82 FR 22904) (``the NPRM''). The 
NPRM was prompted by an evaluation by the design approval holder 
indicating that the wing bottom skin at the MLG reinforcing plate is 
subject to WFD. The NPRM proposed to require a modification of the wing 
bottom skin at the MLG reinforcing plate. We are issuing this AD to 
prevent multi-site damage in the bottom skin at the MLG reinforcing 
plate, which could result in reduced structural integrity of the wing.
    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA 
Airworthiness Directive 2016-0170, dated August 19, 2016 (referred to 
after this as the Mandatory Continuing Airworthiness Information, or 
``the MCAI''), to correct an unsafe condition for all Airbus Model 
A310-203, -221, -222, -304, -322, -324, and -325 airplanes. The MCAI 
states:

    In response to the FAA Part 26 rule, wing structural items of 
the Airbus A310 design that are deemed potentially susceptible to 
Widespread Fatigue Damage (WFD) have been assessed. The bottom skin 
at the main landing gear (MLG) reinforcing plate has been 
highlighted as an area susceptible to Multi Site Damage (MSD).
    This condition, if not corrected, could reduce the structural 
integrity of the wing.
    Airbus performed a detailed widespread fatigue damage tolerance 
analysis of the bottom skin at the MLG reinforcing plate, and 
concluded that a modification is necessary to the fastener holes at 
the inboard edge of the reinforcing plate forward of the rear spar. 
The modification consists of inspection [related investigative 
actions of a check and a rotating probe inspection] and a first 
oversize of the critical holes on the first two rows of fasteners 
[and corrective actions, e.g., repair]. Airbus modification 13751 
was introduced and Service Bulletin (SB) A310-57-2104 was issued to 
provide in-service modification instructions. The accomplishment of 
this modification at the specified time will recondition/renovate/
extend the life of the fastener holes in the bottom skin at the MLG 
reinforcing plate and prevent the development of MSD up to the 
Extended Service Goal (ESG).
    For the reasons described above, this [EASA] AD requires certain 
modifications to the wing bottom skin at the MLG reinforcing plate, 
forward of the wing rear spar [including related investigative 
actions of a check and a rotating probe inspection and corrective 
actions, e.g., 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-2017-
0472.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM or on the determination of 
the cost to the public.

Conclusion

    We reviewed the relevant data and determined that air safety and 
the public interest require adopting this AD as proposed except for 
minor editorial changes. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

    Airbus has issued Service Bulletin A310-57-2104, dated December 15, 
2015. This service information describes procedures for modification of 
the left-hand and right-hand wing bottom skin at the MLG reinforcing 
plate, including related investigative actions and applicable 
corrective actions. 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.

Costs of Compliance

    We estimate that this AD affects 8 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
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                                                                                     Cost per      Cost on U.S.
               Action                         Labor cost            Parts cost        product        operators
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Modification.......................  52 work-hours x $85 per             $12,000         $16,420        $131,360
                                      hour = $4,420.
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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.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs

[[Page 40685]]

applicable to transport category airplanes to the Director of the 
System Oversight Division.

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.

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 adding the following new airworthiness 
directive (AD):

2017-17-12 Airbus: Amendment 39-19002; Docket No. FAA-2017-0472; 
Product Identifier 2016-NM-148-AD.

(a) Effective Date

    This AD is effective October 2, 2017.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Airbus Model A310-203, -221, -222, -304, -
322, -324, and -325 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 an evaluation by the design approval 
holder indicating that the wing bottom skin at the main landing gear 
(MLG) reinforcing plate is subject to widespread fatigue damage. We 
are issuing this AD to prevent multi-site damage in the bottom skin 
at the MLG reinforcing plate, which could result in reduced 
structural integrity of the wing.

(f) Compliance

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

(g) Modification

    Within the compliance times defined in table 1 to paragraph (g) 
of this AD, table 2 to paragraph (g) of this AD, or table 3 to 
paragraph (g) of this AD, as applicable to airplane type and 
utilization: Do a modification of the left-hand and right-hand wing 
bottom skin at the MLG reinforcing plate, including all related 
investigative actions and applicable corrective actions, in 
accordance with the Accomplishment Instructions of Airbus Service 
Bulletin A310-57-2104, dated December 15, 2015, except as required 
by paragraph (h) of this AD. Do all related investigative and 
applicable corrective actions before further flight. For the purpose 
of this AD, the term ``short range'' applies to airplanes with an 
average flight time (AFT) lower than 1.5 flight hours per flight 
cycle, and the term ``long range'' applies to airplanes with an 
average flight time equal to or higher than 1.5 flight hours per 
flight cycle. For determining the ``short range'' and ``long range'' 
airplanes, the AFT is the total accumulated flight hours, counted 
from take-off to touch-down, divided by the total accumulated flight 
cycles at the effective date of this AD.

  Table 1 to Paragraph (g) of This AD--Model A310-200 Series Airplanes
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            Compliance time (whichever occurs later, A or B)
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A Before exceeding 28,800 flight cycles (FC) or 57,600 flight hours
 (FH), whichever occurs first since first flight of the airplane.
B Within 960 FC, or 1,920 FH, or 12 months, whichever occurs first after
 the effective date of this AD.
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   Table 2 to Paragraph (g) of This AD--Model A310-300 ``Short-Range''
                                Airplanes
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            Compliance time (whichever occurs later, A or B)
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A Before exceeding 27,700 FC or 77,700 FH, whichever occurs first since
 first flight of the airplane.
B Within 920 FC, or 2,580 FH, or 12 months, whichever occurs first after
 the effective date of this AD.
------------------------------------------------------------------------

   Table 3 to Paragraph (g) of This AD--Model A310-300 ``Long-Range''
                                Airplanes
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            Compliance time (whichever occurs later, A or B)
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A Before exceeding 20,500 FC or 102,500 FH, whichever occurs first since
 first flight of the airplane.
B Within 680 FC, or 3,420 FH, or 12 months, whichever occurs first after
 the effective date of this AD.
------------------------------------------------------------------------

(h) Exception to Service Information Specifications

    Where Airbus Service Bulletin A310-57-2104, dated December 15, 
2015, specifies to contact Airbus for appropriate action, and 
specifies that action as ``RC'' (Required for Compliance): Before 
further flight, accomplish corrective actions in accordance with the 
procedures specified in paragraph (i)(2) of this AD.

(i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, 
International Section, Transport Standards Branch, 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 Section, send it to the attention of 
the person identified in paragraph (j)(2) of this AD. Information 
may be emailed to: 9-ANM-116-AMOC-REQUESTS@faa.gov. 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.
    (2) Contacting the Manufacturer: 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 
Section, Transport Standards Branch, FAA; or the European Aviation 
Safety Agency (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 (h) 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.

[[Page 40686]]

(j) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) EASA Airworthiness Directive 2016-0170, dated August 19, 
2016, 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-2017-0472.
    (2) For more information about this AD, contact Dan Rodina, 
Aerospace Engineer, International Section, Transport Standards 
Branch, FAA, 1601 Lind Avenue SW., Renton, WA 98057-3356; telephone 
425-227-2125; fax 425-227-1149.

(k) 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 this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Airbus Service Bulletin A310-57-2104, dated December 15, 
2015.
    (ii) Reserved.
    (3) For service information identified in this AD, contact 
Airbus SAS, Airworthiness Office--EAW, 1 Rond Point Maurice 
Bellonte, 31707 Blagnac Cedex, France; telephone +33 5 61 93 36 96; 
fax +33 5 61 93 44 51; email account.airworth-eas@airbus.com; 
Internet http://www.airbus.com.
    (4) You may view this service information at the FAA, Transport 
Standards Branch, 1601 Lind Avenue SW., Renton, WA. For information 
on the availability of this material at the FAA, call 425-227-1221.
    (5) 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 August 9, 2017.
Dionne Palermo,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2017-17537 Filed 8-25-17; 8:45am]
BILLING CODE 4910-13-P