Document ID: FAA-2018-0762-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Airbus SAS Airplanes
Posted Date: 2018-08-31T04:00Z

[Federal Register Volume 83, Number 170 (Friday, August 31, 2018)]
[Proposed Rules]
[Pages 44516-44521]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-18813]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0762; Product Identifier 2018-NM-033-AD]
RIN 2120-AA64

Airworthiness Directives; Airbus SAS Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede Airworthiness Directive (AD) 2016-07-
23, which applies to all Airbus SAS Model A318, A319, A320, and A321 
series airplanes. AD 2016-07-23 requires, for certain airplanes, 
repetitive replacements of the fixed fairing upper and lower attachment 
studs of both the left-hand (LH) and right-hand (RH) main landing gear 
(MLG); and repetitive inspections for corrosion, wear, fatigue 
cracking, and loose studs of each forward stud assembly of the fixed 
fairing door upper and lower forward attachments of both the LH and RH 
MLG; and replacement if necessary. AD 2016-07-23 also provides an 
optional terminating modification for the repetitive replacements of 
the fixed fairing upper and lower attachment studs. Since we issued AD 
2016-07-23, we have determined that for some airplane configurations, 
associated fixed fairing assembly part numbers susceptible to fatigue 
cracking were not listed in certain service information required by AD 
2016-07-23. In addition, we have determined that additional work is 
necessary to re-identify the fixed fairing assembly part number on 
certain airplanes. This proposed AD would retain the requirements of AD 
2016-07-23 and, for certain airplanes, require re-identification of the 
LH and RH fixed fairing assemblies' part numbers. We are proposing this 
AD to address the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by October 15, 
2018.

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--EIAS, Rond-Point Emile Dewoitine No: 2, 
31700 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 Standards Branch, 2200 South 216th St.,

[[Page 44517]]

Des Moines, WA. For information on the availability of this material at 
the FAA, call 206-231-3195.

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-2018-
0762; 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 NPRM, 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: Sanjay Ralhan, Aerospace Engineer, 
International Section, Transport Standards Branch, FAA, 2200 South 
216th St., Des Moines, WA 98198; telephone and fax 206-231-3223.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2018-0762; 
Product Identifier 2018-NM-033-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

    We issued AD 2016-07-23, Amendment 39-18468 (81 FR 26115, May 2, 
2016) (``AD 2016-07-23''), for all Airbus SAS Model A318, A319, A320, 
and A321 series airplanes. AD 2016-07-23 requires, for certain 
airplanes, repetitive replacements of the fixed fairing upper and lower 
attachment studs of both the LH and RH MLG; and repetitive inspections 
for corrosion, wear, fatigue cracking, and loose studs of each forward 
stud assembly of the fixed fairing door upper and lower forward 
attachment of both the LH and RH MLG; and replacement if necessary. AD 
2016-07-23 also provides an optional terminating modification for the 
repetitive replacements of the fixed fairing upper and lower attachment 
studs. AD 2016-07-23 resulted from reports of in-flight loss of fixed 
and hinged MLG fairings, and reports of post-modification MLG fixed 
fairing assemblies that have wear and corrosion. We issued AD 2016-07-
23 to address in-flight detachment of an MLG fixed fairing and 
consequent damage to the airplane.

Actions Since AD 2016-07-23 Was Issued

    Since we issued AD 2016-07-23, we have determined that for some 
airplane configurations, associated fixed fairing assembly part numbers 
susceptible to fatigue cracking were not listed in certain service 
information required by AD 2016-07-23. In addition, we have determined 
that additional work is necessary to re-identify the fixed fairing 
assembly part number after completion of the optional terminating 
modification. This proposed AD would retain the requirements of AD 
2016-07-23 and require re-identification of the part number of the LH 
and RH fixed fairing assemblies after completion of the optional 
terminating modification.
    The European Aviation Safety Agency (EASA), which is the Technical 
Agent for the Member States of the European Union, has issued EASA AD 
2018-0023, dated January 26, 2018; corrected February 5, 2018 (referred 
to after this as the Mandatory Continuing Airworthiness Information, or 
``the MCAI''), to correct an unsafe condition for all Airbus SAS Model 
A318 and A319 series airplanes; all Airbus SAS Model A320-211, A320-
212, A320-214, A320-216, A320-231, A320-232, and A320-233 airplanes; 
and all Airbus SAS Model A321-111, A321-112, A321-131, A321-211, A321-
212, A321-213, A321-231 and A321-232 airplanes. The MCAI states:

    Several occurrences were reported of in-flight loss of main 
landing gear (MLG) fixed and hinged fairings. The majority of 
reported events occurred following scheduled maintenance activities. 
One result of the investigation was that a discrepancy between the 
drawing and the maintenance manuals was discovered. The maintenance 
documents were corrected to prevent mis-rigging of the MLG fixed and 
hinged fairings, which could induce fatigue cracking.
    Prompted by these findings, Airbus issued Service Bulletin (SB) 
A320-52-1083, providing instructions for a one-time inspection of 
the MLG fixed fairing composite insert and the surrounding area, 
replacement of the adjustment studs at the lower forward position 
and adjustment to the new clearance tolerances. That SB was replaced 
by Airbus SB A320-52-1100 (modification (mod) 27716) introducing a 
re-designed location stud, rod end and location plate at the forward 
upper and lower leg fixed-fairing positions. Subsequently, reports 
were received of post-mod 27716/post-SB A320-52-1100 MLG fixed 
fairing assemblies with corrosion, which could also induce cracking.
    This condition, if not detected and corrected, could lead to 
further cases of in-flight detachment of a MLG fixed fairing, 
possibly resulting in injury to persons on the ground and/or damage 
to the aeroplane.
    To address this potential unsafe condition, EASA issued AD 2014-
0096 to require repetitive detailed inspections (DET) of the MLG 
fixed fairings, and, depending on findings, accomplishment of 
applicable corrective actions. That [EASA] AD also prohibited 
installation of certain MLG fixed fairing rod end assemblies and 
studs as replacement parts on aeroplanes incorporating Airbus mod 
27716 in production, or modified in accordance with Airbus SB A320-
52-1100 (any revision) in service.
    Since EASA AD 2014-0096 was issued, Airbus developed an 
alternative inspection programme to meet the [EASA] AD requirements. 
In addition, a terminating action (mod 155648) was developed, which 
was made available for in-service aeroplanes through Airbus SB A320-
52-1165.
    Consequently, EASA issued AD 2015-0001 (later revised), 
retaining the requirements of EASA AD 2014-0096, which was 
superseded, and adding an optional terminating action for the 
repetitive inspections. For post-mod aeroplanes, i.e. incorporating 
Airbus mod 155648 in production, or modified by Airbus SB A320-52-
1165 in service, the only remaining requirement was to ensure that 
pre-mod components are no longer installed.
    Since EASA AD 2015-0001R1 [which corresponds to FAA AD 2016-07-
23] was issued, Airbus revised SB A320-52-1165 to include additional 
work, to re-identify the fairing assembly part number (P/N). During 
the preparation of this additional work, it was noted that several 
configurations and associated P/N were not listed in the original 
SB, which may have an impact on aeroplanes on which SB A320-52-1165 
original issue or Revision (rev.) 01 was already accomplished. It 
has also been noticed that the instructions for reidentification of 
two P/N were not correct in revision 02 of this SB.
    For the reasons described above, this [EASA] AD retains the 
requirement of EASA AD 2015-0001R1, which is superseded, but 
requires using the SB at rev. 03.
    This [EASA] AD also requires accomplishment of additional work 
[re-identification of the part number for the LH and RH fixed 
fairing assemblies] for those aeroplanes on which parts were 
replaced in accordance with the instructions of Airbus SB A320-52-
1165 at original issue, rev. 01 or rev. 02 and correct 
(re)identification as applicable.

    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-2018-
0762.

[[Page 44518]]

Related Service Information Under 1 CFR Part 51

    Airbus SAS has issued the following service information.
     Airbus Service Bulletin A320-52-1100, Revision 01, dated 
March 12, 1999. This service information describes procedures for 
modification of the airplane to post-Airbus Modification 27716 
configuration (by replacing the location stud, rod end, and location 
plate at the forward upper and lower leg fixed-fairing positions of the 
MLG door assemblies). The modification includes a resonance frequency 
inspection for debonding of the composite insert and delamination of 
the honeycomb area around the insert, and applicable corrective 
actions. Corrective actions include repairing the insert. The actions 
in this service information are an optional terminating modification.
     Airbus Service Bulletin A320-52-1163, Revision 01, 
including Appendix 01, dated June 22, 2015. This service information 
describes procedures for inspection of the fixed fairing door upper and 
lower forward attachments of the LH and RH MLG, and replacement of the 
fixed fairing upper and lower attachment studs of the LH and RH MLG.
     Airbus Service Bulletin A320-52-1165, Revision 03, 
excluding Appendix 01 and including Appendix 02, dated November 9, 
2017. The service information describes procedures for replacing the 
fixed fairing attachment stud assemblies of the MLG door assembly with 
new assemblies, and re-identifying the part number of the LH and RH MLG 
fixed fairing assemblies. The actions in this service information are 
an optional terminating modification.
    The 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

    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.

Proposed Requirements of This NPRM

    This proposed AD would retain all of the requirements of AD 2016-
07-23. This proposed AD would require accomplishing the actions 
specified in the service information described previously.

Costs of Compliance

    We estimate that this proposed AD affects 901 airplanes of U.S. 
registry. We estimate the following costs to comply with this proposed 
AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
18 work-hours x $85 per hour = $1,530........................          $4,110           $5,640       $5,081,640
----------------------------------------------------------------------------------------------------------------

                  Estimated Costs for Optional Actions
------------------------------------------------------------------------
           Labor cost                 Parts cost       Cost per product
------------------------------------------------------------------------
Up to 18 work-hours x $85 per     Up to $4,110......  Up to $5,640
 hour = $1,530.
------------------------------------------------------------------------

    We estimate the following costs to do any necessary replacements or 
re-identifications that would be required based on the results of the 
inspection. We have no way of determining the number of aircraft that 
might need these replacements or re-identifications:

                           On-Condition Costs
------------------------------------------------------------------------
           Labor cost                 Parts cost       Cost per product
------------------------------------------------------------------------
Up to 20 work-hours x $85 per     Up to $4,110......  Up to $5,810
 hour = $1,700.
------------------------------------------------------------------------

    According to the manufacturer, some or all of the costs of this AD 
may be covered under warranty, thereby reducing the cost impact on 
affected individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all costs in our cost 
estimate.

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

[[Page 44519]]

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 removing Airworthiness Directive (AD) 
2016-07-23, Amendment 39-18468 (81 FR 26115, May 2, 2016), and adding 
the following new AD:

Airbus SAS: Docket No. FAA-2018-0762; Product Identifier 2018-NM-
033-AD.

(a) Comments Due Date

    We must receive comments by October 15, 2018.

(b) Affected ADs

    This AD replaces AD 2016-07-23, Amendment 39-18468 (81 FR 26115, 
May 2, 2016) (``AD 2016-07-23'').

(c) Applicability

    This AD applies to the Airbus SAS airplanes identified in 
paragraphs (c)(1) through (c)(4) of this AD, certificated in any 
category, all manufacturer serial numbers.
    (1) Model A318-111, A318-112, A318-121, and A318-122 airplanes.
    (2) Model A319-111, A319-112, A319-113, A319-114, A319-115, 
A319-131, A319-132, and A319-133 airplanes.
    (3) Model A320-211, A320-212, A320-214, A320-216, A320-231, 
A320-232, and A320-233 airplanes.
    (4) Model A321-111, A321-112, A321-131, A321-211, A321-212, 
A321-213, A321-231 and A321-232 airplanes.

(d) Subject

    Air Transport Association (ATA) of America Code 52, Doors.

(e) Reason

    This AD was prompted by reports of in-flight loss of fixed and 
hinged main landing gear (MLG) fairings, and reports of post-
modification MLG fixed fairing assemblies that have wear and 
corrosion. This AD was also prompted by a determination that for 
some airplane configurations, associated fixed fairing assembly part 
numbers susceptible to fatigue cracking were not listed in certain 
service information required by AD 2016-07-23. In addition, we have 
determined that additional work is necessary to re-identify the 
fixed fairing assembly part number on certain airplanes. We are 
issuing this AD to prevent in-flight detachment of an MLG fixed 
fairing and consequent damage to the airplane.

(f) Compliance

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

(g) Retained Repetitive Replacements, With No Changes

    This paragraph restates the requirements of paragraph (g) of AD 
2016-07-23, with no changes. For airplanes in pre-Airbus 
Modification 27716 and pre-Airbus Service Bulletin A320-52-1100 
configuration, with any of the components installed that are 
identified in paragraphs (g)(1) through (g)(5) of this AD: At the 
applicable compliance time specified in paragraph (h) of this AD, 
replace fixed fairing upper and lower attachment studs of both left-
hand (LH) and right-hand (RH) MLG, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-52-1163, 
Revision 01, including Appendix 01, dated June 22, 2015. Repeat the 
replacements thereafter at intervals not to exceed 6,500 flight 
cycles.
    (1) Plate--support having part number (P/N) D5284024820000.
    (2) Plate--support having P/N D5284024820200.
    (3) Stud--adjustment having P/N D5284024420000.
    (4) Rod end assembly (lower) having P/N D5284000500000.
    (5) Rod end assembly (upper) having P/N D5284000600000.

(h) Retained Compliance Times for the Requirements of Paragraph (g) of 
This AD, With No Changes

    This paragraph restates the requirements of paragraph (h) of AD 
2016-07-23, with no changes. For airplanes identified in paragraph 
(g) of this AD, except as provided by paragraph (o) of this AD: Do 
the initial replacement required by paragraph (g) of this AD at the 
latest of the times specified in paragraphs (h)(1) through (h)(4) of 
this AD.
    (1) Before the accumulation of 6,500 total flight cycles since 
the airplane's first flight.
    (2) Within 6,500 flight cycles since the last installation of a 
pre-Airbus Modification 27716 stud on the airplane.
    (3) Within 1,500 flight cycles after June 6, 2016 (the effective 
date of AD 2016-07-23).
    (4) Within 8 months after June 6, 2016 (the effective date of AD 
2016-07-23).

(i) Retained Repetitive Inspections, With No Changes

    This paragraph restates the requirements of paragraph (i) of AD 
2016-07-23, with no changes. For airplanes in post-Airbus 
Modification 27716 or post-Airbus Service Bulletin A320-52-1100 
configuration, with any of the components installed that are 
identified in paragraphs (i)(1), (i)(2), and (i)(3) of this AD: At 
the applicable compliance time specified in paragraph (j) of this 
AD, do a detailed inspection of the LH and RH MLG forward stud 
assemblies of the fixed fairing door upper and lower forward 
attachments of both LH and RH MLG for indications of corrosion, 
wear, fatigue cracking, and loose studs, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-52-1163, 
Revision 01, including Appendix 01, dated June 22, 2015. Repeat the 
detailed inspection thereafter at intervals not to exceed 12 months. 
Replacement of both LH and RH MLG forward stud assemblies on an 
airplane, in accordance with the Accomplishment Instructions of 
Airbus Service Bulletin A320-52-1163, Revision 01, including 
Appendix 01, dated June 22, 2015, extends the interval for the next 
detailed inspection to 72 months; and the inspection must be 
repeated thereafter at intervals not to exceed 12 months.
    (1) Stud--adjustment having P/N D5285600720000.
    (2) Rod end assembly (lower) having P/N D5285600400000.
    (3) Rod end assembly (upper) having P/N D5285600500000.

(j) Retained Compliance Times for the Requirements of Paragraph (i) of 
This AD, With No Changes

    This paragraph restates the requirements of paragraph (j) of AD 
2016-07-23, with no changes. For airplanes identified in paragraph 
(i) of this AD, except as provided by paragraph (o) of this AD: Do 
the initial inspection required by paragraph (i) of this AD at the 
latest of the times specified in paragraphs (j)(1) through (j)(4) of 
this AD.
    (1) Before the accumulation of 72 months since the airplane's 
first flight.
    (2) Within 72 months since the last installation of a post-
Airbus Modification 27716 assembly or since accomplishment of the 
actions specified in Airbus Service Bulletin A320-52-1100.
    (3) Within 1,500 flight cycles after June 6, 2016 (the effective 
date of AD 2016-07-23).
    (4) Within 8 months after June 6, 2016 (the effective date of AD 
2016-07-23).

[[Page 44520]]

(k) Retained Corrective Action, With Revised Service Information

    This paragraph restates the requirements of paragraph (k) of AD 
2016-07-23, with revised service information. If any discrepancy 
(including any indication of corrosion, wear, fatigue cracking, or 
loose studs) of any MLG forward stud assembly is found during any 
inspection required by paragraph (i) of this AD, except as specified 
in paragraph (l) of this AD: Before further flight, replace the 
discrepant upper and lower fixed fairing forward stud assemblies of 
the LH and RH MLG, in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A320-52-1163, Revision 01, 
including Appendix 01, dated June 22, 2015; or Airbus Service 
Bulletin A320-52-1165, Revision 01, dated October 23, 2015, 
excluding Appendix 01, dated November 3, 2014, and including 
Appendix 02, dated October 23, 2015; or Airbus Service Bulletin 
A320-52-1165, Revision 03, excluding Appendix 01 and including 
Appendix 02, dated November 9, 2017. As of the effective date of 
this AD only Airbus Service Bulletin A320-52-1163, Revision 01, 
including Appendix 01, dated June 22, 2015; or Airbus Service 
Bulletin A320-52-1165, Revision 03, excluding Appendix 01 and 
including Appendix 02, dated November 9, 2017, may be used.

(l) Retained Corrective Action or Repetitive Inspections for Certain 
Corrosion Findings, With Revised Service Information

    This paragraph restates the requirements of paragraph (l) of AD 
2016-07-23, with revised service information. If any corrosion is 
found during any inspection required by paragraph (i) of this AD on 
any MLG fixed fairing forward stud assembly (upper, lower, LH or 
RH), but the corroded stud is not loose: Do the action specified in 
paragraph (l)(1) or (l)(2) of this AD.
    (1) Before further flight, replace the affected assembly, in 
accordance with the Accomplishment Instructions of Airbus Service 
Bulletin A320-52-1163, Revision 01, including Appendix 01, dated 
June 22, 2015; or Airbus Service Bulletin A320-52-1165, Revision 01, 
dated October 23, 2015, excluding Appendix 01, dated November 3, 
2014, and including Appendix 02, dated October 23, 2015; or Airbus 
Service Bulletin A320-52-1165, Revision 03, excluding Appendix 01 
and including Appendix 02, dated November 9, 2017. As of the 
effective date of this AD only Airbus Service Bulletin A320-52-1163, 
Revision 01, including Appendix 01, dated June 22, 2015; or Airbus 
Service Bulletin A320-52-1165, Revision 03, excluding Appendix 01 
and including Appendix 02, dated November 9, 2017, may be used.
    (2) Within 4 months after finding corrosion, and thereafter at 
intervals not to exceed 4 months, do a detailed inspection for 
indications of corrosion, wear, fatigue cracking, and loose studs of 
the forward stud assembly of the affected (LH or RH) MLG, in 
accordance with the Accomplishment Instructions of Airbus Service 
Bulletin A320-52-1163, Revision 01, including Appendix 01, dated 
June 22, 2015.

(m) Retained Corrective Action for Inspections Specified in Paragraph 
(l)(2) of This AD, With Revised Service Information

    This paragraph restates the requirements of paragraph (m) of AD 
2016-07-23, with revised service information. If any indication of 
wear, fatigue cracking, or loose studs of any forward stud assembly 
is found during any inspection required by paragraph (l)(2) of this 
AD: Before further flight, replace the affected (LH or RH) MLG fixed 
fairing forward stud assembly, in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A320-52-1163, Revision 01, 
including Appendix 01, dated June 22, 2015; or Airbus Service 
Bulletin A320-52-1165, Revision 01, dated October 23, 2015, 
excluding Appendix 01, dated November 3, 2014, and including 
Appendix 02, dated October 23, 2015; or Airbus Service Bulletin 
A320-52-1165, Revision 03, excluding Appendix 01 and including 
Appendix 02, dated November 9, 2017. As of the effective date of 
this AD only Airbus Service Bulletin A320-52-1163, Revision 01, 
including Appendix 01, dated June 22, 2015; or Airbus Service 
Bulletin A320-52-1165, Revision 03, excluding Appendix 01 and 
including Appendix 02, dated November 9, 2017, may be used.

(n) Retained Terminating Action, With Revised Service Information

    This paragraph restates the requirements of paragraph (n) of AD 
2016-07-23, with revised service information.
    (1) Replacement of parts on an airplane, as required by 
paragraph (g), (k), (l)(1), or (m) of this AD, does not constitute 
terminating action for the repetitive inspections required by 
paragraph (i) of this AD, except as specified in paragraph (n)(3) of 
this AD.
    (2) The repetitive replacements required by paragraph (g) of 
this AD may be terminated by modification of the airplane to post-
Airbus Modification 27716 configuration, including a resonance 
frequency inspection for debonding of the composite insert and 
delamination of the honeycomb area around the insert, and all 
applicable corrective actions, in accordance with the Accomplishment 
Instructions of Airbus Service Bulletin A320-52-1100, Revision 01, 
dated March 12, 1999, provided all applicable corrective actions are 
done before further flight. Thereafter, refer to paragraph (i) of 
this AD to determine the compliance time for the next detailed 
inspection required by this AD.
    (3) Modification of an airplane, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-52-1165, 
Revision 01, dated October 23, 2015, excluding Appendix 01, dated 
November 3, 2014, and including Appendix 02, dated October 23, 2015; 
or Airbus Service Bulletin A320-52-1165, Revision 03, excluding 
Appendix 01 and including Appendix 02, dated November 9, 2017, 
constitutes terminating action for actions required by paragraphs 
(g) through (m) of this AD for the airplane on which the 
modification is done. As of the effective date of this AD only 
Airbus Service Bulletin A320-52-1165, Revision 03, excluding 
Appendix 01 and including Appendix 02, dated November 9, 2017, may 
be used.

(o) Retained Exceptions to Certain AD Actions, With No Changes

    This paragraph restates the requirements of paragraph (o) of AD 
2016-07-23, with no changes. An airplane on which Airbus 
Modification 155648 has been embodied in production is not affected 
by the requirements of paragraphs (g) and (i) of this AD, provided 
that no affected component, identified by part number as specified 
in paragraphs (g)(1) through (g)(5) and (i)(1) through (i)(3) of 
this AD, has been installed on that airplane since first flight of 
the airplane.

(p) Retained Parts Installation Prohibition, With No Changes

    This paragraph restates the requirements of paragraph (p) of AD 
2016-07-23, with no changes.
    (1) For airplanes in pre-Airbus Modification 27716 or pre-Airbus 
Service Bulletin A320-52-1100 configuration: No person may install a 
component identified in paragraphs (g)(1) through (g)(5) of this AD 
on any airplane after doing the actions provided in paragraph (n)(2) 
of this AD.
    (2) For airplanes in post-Airbus Modification 27716 or post 
Airbus Service Bulletin A320-52-1100 configuration: As of the 
effective date of this AD, no person may install a component 
identified in paragraphs (g)(1) through (g)(5) of this AD on any 
airplane.
    (3) For airplanes in pre-Airbus Modification 155648 or pre-
Airbus Service Bulletin A320-52-1165 configuration: No person may 
install a component identified in paragraphs (g)(1) through (g)(5) 
and (i)(1) through (i)(3) of this AD on any airplane after doing the 
actions provided in paragraph (n)(3) of this AD.
    (4) For airplanes in post-Airbus Modification 155648 or post-
Airbus Service Bulletin A320-52-1165 configuration: As of the 
effective date of this AD, no person may install a component 
identified in (g)(1) through (g)(5) and (i)(1) through (i)(3) of 
this AD on any airplane.

(q) Retained No Reporting Requirement, With No Changes

    This paragraph restates the requirements of paragraph (q) of AD 
2016-07-23, with no changes. Although Airbus Service Bulletin A320-
52-1163, Revision 01, including Appendix 01, dated June 22, 2015, 
specifies to submit certain information to the manufacturer, and 
specifies that action as ``RC'' (Required for Compliance), this AD 
does not include that requirement.

(r) New Requirement of This AD: Additional Work

    For any airplane on which, before the effective date of this AD, 
any part was installed or replaced, in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-52-1165, 
dated November 3, 2014; Revision 01, dated October 13, 2015; or 
Revision 02, dated February 12, 2016: Within 12 months after the 
effective date of this AD, accomplish the instructions identified as 
``additional work'' in the Accomplishment Instructions of Airbus 
Service Bulletin A320-52-1165,

[[Page 44521]]

Revision 03, excluding Appendix 01 and including Appendix 02, dated 
November 9, 2017, as applicable to the airplane configuration.

(s) New Terminating Action

    Modification of an airplane in accordance with the 
Accomplishment Instructions of Airbus Service Bulletin A320-52-1165, 
Revision 03, excluding Appendix 01 and including Appendix 02, dated 
November 9, 2017, or as specified in paragraph (r) of this AD 
constitutes terminating action for the requirements of paragraphs 
(g), (i), (k), (l), and (m) of this AD for that airplane.

(t) New Parts Installation Prohibition

    (1) Do not install on any airplane a component specified in 
paragraphs (g)(1) through (g)(5) of this AD, as required by 
paragraph (t)(1)(i) or (t)(1)(ii) of this AD, as applicable.
    (i) For airplanes in pre-Airbus Modification 27716 or pre-Airbus 
Service Bulletin A320-52-1100 configuration: After completing the 
optional modification specified in paragraph (n)(2) of this AD.
    (ii) For airplanes in post-Airbus Modification 27716 or post 
Airbus Service Bulletin A320-52-1100 configuration: As of the 
effective date of this AD.
    (2) Do not install on any airplane a component specified in 
paragraphs (g)(1) through (g)(5) of this AD or paragraphs (i)(1) 
through (i)(3) of this AD, as required by paragraph (t)(2)(i) or 
(t)(2)(ii) of this AD, as applicable.
    (i) For airplanes in pre-Airbus Modification 155648 or pre-
Airbus Service Bulletin A320-52-1165, Revision 03, excluding 
Appendix 01 and including Appendix 02, dated November 9, 2017, 
configuration: After completion of the additional work required by 
paragraph (r) of this AD.
    (ii) For airplanes in post-Airbus Modification 155648 or post-
Airbus Service Bulletin A320-52-1165, Revision 03, excluding 
Appendix 01 and including Appendix 02, dated November 9, 2017, 
configuration: As of the effective date of this AD.

(u) Credit for Previous Actions

    (1) This paragraph provides credit for optional actions provided 
by paragraph (n)(2) of this AD, if those actions were performed 
before the effective date of this AD using Airbus Service Bulletin 
A320-52-1100, dated December 7, 1998.
    (2) This paragraph provides credit for the actions required by 
paragraphs (g), (i), (k), (l), and (m) of this AD, if those actions 
were performed before the effective date of this AD using Airbus 
Service Bulletin A320-52-1163, dated February 4, 2014.
    (3) This paragraph provides credit for the actions required by 
paragraphs (k), (l)(1), (m), and (n)(3) of this AD if those actions 
were performed before the effective date of this AD using Airbus 
Service Bulletin A320-52-1165, Revision 01, dated October 23, 2015, 
excluding Appendix 01, dated November 3, 2014, and including 
Appendix 02, dated October 23, 2015.

(v) Other FAA AD Provisions

    (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 (w)(2) of this AD. Information 
may be emailed to: [email protected].
    (i) 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.
    (ii) AMOCs approved previously for AD 2016-07-23 are approved as 
AMOCs for the corresponding provisions of 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 Section, Transport Standards 
Branch, FAA; or the European Aviation Safety Agency (EASA); or 
Airbus SAS'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 specified by 
paragraph (q) 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.

(w) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) EASA AD 2018-0023, dated January 26, 2018; corrected February 
5, 2018; 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-2018-0762.
    (2) For more information about this AD, contact Sanjay Ralhan, 
Aerospace Engineer, International Section, Transport Standards 
Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone 
and fax 206-231-3223.
    (3) For service information identified in this AD, contact 
Airbus SAS, Airworthiness Office--EIAS, Rond-Point Emile Dewoitine 
No: 2, 31700 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 service information at the 
FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, 
WA. For information on the availability of this material at the FAA, 
call 206-231-3195.

    Issued in Des Moines, Washington, on August 17, 2018.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-18813 Filed 8-30-18; 8:45 am]
 BILLING CODE 4910-13-P