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Proposed Rule2022-08585

Airworthiness Directives; Airbus SAS Airplanes

Primary source

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Published

April 22, 2022

Issuing agencies

Transportation DepartmentFederal Aviation Administration

Abstract

The FAA proposes to supersede Airworthiness Directive (AD) 2018-13-08 which applies to certain Airbus SAS Model A318 series airplanes; Model A319-111, -112, -113, -114, -115, -131, -132, and -133 airplanes; Model A320-211, -212, -214, -216, -231, -232, and -233 airplanes; and Model A321-111, -112, -131, -211, -212, -213, -231, and -232 airplanes. AD 2018-13-08 requires repetitive inspections for cracking of the radius of the front spar vertical stringers and the horizontal floor beam on frame (FR) 36, repetitive inspections for cracking of the fastener holes of the front spar vertical stringers on FR 36, and repair if necessary, and, for certain airplanes, a potential terminating action modification of the center wing box area. Since the FAA issued AD 2018-13-08, Airbus has determined that additional airplanes are subject to the unsafe condition. This proposed AD would revise the applicability by adding airplanes and retain the requirements of AD 2018-13-08, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

Full Text

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<title>Federal Register, Volume 87 Issue 78 (Friday, April 22, 2022)</title>
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[Federal Register Volume 87, Number 78 (Friday, April 22, 2022)]
[Proposed Rules]
[Pages 24081-24084]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-08585]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0468; Project Identifier MCAI-2021-01243-T]
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: The FAA proposes to supersede Airworthiness Directive (AD)
2018-13-08 which applies to certain Airbus SAS Model A318 series
airplanes; Model A319-111, -112, -113, -114, -115, -131, -132, and -133
airplanes; Model A320-211, -212, -214, -216, -231, -232, and -233
airplanes; and Model A321-111, -112, -131, -211, -212, -213, -231, and
-232 airplanes. AD 2018-13-08 requires repetitive inspections for
cracking of the radius of the front spar vertical stringers and the
horizontal floor beam on frame (FR) 36, repetitive inspections for
cracking of the fastener holes of the front spar vertical stringers on
FR 36, and repair if necessary, and, for certain airplanes, a potential
terminating action modification of the center wing box area. Since the
FAA issued AD 2018-13-08, Airbus has determined that additional
airplanes are subject to the unsafe condition. This proposed AD would
revise the applicability by adding airplanes and retain the
requirements of AD 2018-13-08, as specified in a European Union
Aviation Safety Agency (EASA) AD, which is proposed for incorporation
by reference. The FAA is proposing this AD to address the unsafe
condition on these products.

DATES: The FAA must receive comments on this proposed AD by June 6,
2022.

ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
For material that will be incorporated by reference (IBR) in this
AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany;
telephone +49 221 8999 000; email <a href="/cdn-cgi/l/email-protection#0f4e4b7c4f6a6e7c6e216a7a7d607f6e216a7a">[email&#160;protected]</a>; internet
www.easa.europa.eu. You may find this IBR material on the EASA website
at <a href="https://ad.easa.europa.eu">https://ad.easa.europa.eu</a>. You may view this IBR material at the
FAA, Airworthiness Products Section, Operational Safety Branch, 2200
South 216th St., Des Moines, WA. For information on the availability of
this material at the FAA, call 206-231-3195. It is also available in
the AD docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2022-0468.

Examining the AD Docket

You may examine the AD docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-2022-
0468; or in person at Docket Operations between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays. The AD docket contains
this NPRM, any comments received, and other information. The street
address for Docket Operations is listed above. Comments will be
available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Vladimir Ulyanov, Aerospace Engineer,
Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198; phone 206-231-3229; email
<a href="/cdn-cgi/l/email-protection#baccd6dbded3d7d3c894cfd6c3dbd4d5ccfadcdbdb94ddd5cc">[email&#160;protected]</a>.

SUPPLEMENTARY INFORMATION:

Comments Invited

The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include ``Docket No. FAA-2022-0468; Project Identifier
MCAI-2021-01243-T'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
the proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
https://

[[Page 24082]]

www.regulations.gov, including any personal information you provide.
The agency will also post a report summarizing each substantive verbal
contact received about this proposed AD.

Confidential Business Information

CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to
Vladimir Ulyanov, Aerospace Engineer, Large Aircraft Section,
International Validation Branch, FAA, 2200 South 216th St., Des Moines,
WA 98198; phone 206-231-3229; email <a href="/cdn-cgi/l/email-protection#71071d1015181c18035f041d08101f1e07311710105f161e07">[email&#160;protected]</a>. Any
commentary that the FAA receives which is not specifically designated
as CBI will be placed in the public docket for this rulemaking.

Discussion

The FAA issued AD 2018-13-08, Amendment 39-19320 (83 FR 33809, July
18, 2018) (AD 2018-13-08) which applies to certain Airbus SAS Model
A318 series airplanes; Model A319-111, -112, -113, -114, -115, -131, -
132, and -133 airplanes; Model A320-211, -212, -214, -216, -231, -232,
and -233 airplanes; and Model A321-111, -112, -131, -211, -212, -213, -
231, and -232 airplanes. AD 2018-13-08 requires repetitive inspections
for cracking of the radius of the front spar vertical stringers and the
horizontal floor beam on FR 36, repetitive inspections for cracking of
the fastener holes of the front spar vertical stringers on FR 36, and
repair if necessary, and, for certain airplanes, a potential
terminating action modification of the center wing box area. The FAA
issued AD 2018-13-08 to address fatigue cracking of the front spar
vertical stringers on the wings, which could result in the reduced
structural integrity of the airplane.

Actions Since AD 2018-13-08 Was Issued

Since the FAA issued AD 2018-13-08, Airbus has determined that
Model A321 airplanes that have incorporated modification 160021
(structural reinforcement for Airbus SAS Model A321 airplanes sharklet
installation) are also subject to the identified unsafe condition. In
addition, Airbus determined that, for airplanes in configuration 5, 6,
or 7, an optional modification of the center wing box after
accumulating a certain number of total flight cycles and total flight
hours terminates the repetitive inspections.
EASA, which is the Technical Agent for the Member States of the
European Union, has issued EASA AD 2021-0241, dated November 8, 2021
(EASA AD 2021-0241) (also referred to as the Mandatory Continuing
Airworthiness Information, or the MCAI), to correct an unsafe condition
for certain Airbus SAS Model A318 series airplanes; Model A319-111, -
112, -113, -114, -115, -131, -132, and -133 airplanes; Model A320-211,
-212, -214, -215, -216, -231, -232, and -233 airplanes; and Model A321-
111, -112, -131, -211, -212, -213, -231, and -232 airplanes. EASA AD
2021-0241 supersedes EASA AD 2017-0099, dated June 8, 2017 (which
corresponds to FAA AD 2018-13-08). Model A320-215 airplanes are not
certificated by the FAA and are not included on the U.S. type
certificate data sheet; this AD therefore does not include those
airplanes in the applicability.
This proposed AD was prompted by a report that, during a center
fuselage certification full-scale fatigue test, cracks were found on
the front spar vertical stringer at a certain frame. This proposed AD
was also prompted by a determination that Model A321 airplanes that
have incorporated modification 160021 are also subject to the unsafe
condition. The FAA is proposing this AD to address fatigue cracking of
the front spar vertical stringers on the wings, which, if not
corrected, could result in the reduced structural integrity of the
airplane. See the MCAI for additional background information.

Model A320-216 Airplanes

The Airbus SAS Model A320-216 was U.S. type certificated on
December 19, 2016. Before that date, any EASA ADs that affected Model
A320-216 airplanes were included in the U.S. type certificate as part
of the Required Airworthiness Actions List (RAAL). One or more Model
A320-216 airplanes have subsequently been placed on the U.S. Register,
and will now be included in FAA AD actions. For Model A320-216
airplanes, the requirements that correspond to AD 2018-13-08 were
mandated by the MCAI via the RAAL. Although that RAAL requirement is
still in effect, for continuity and clarity the FAA has identified
Model A320-216 airplanes in paragraph (c) of this proposed AD; the MCAI
that is specified in paragraph (g) in this proposed AD includes
retained requirements, which would therefore apply to those airplanes.

Explanation of Retained Requirements

Although this proposed AD does not explicitly restate the
requirements of AD 2018-13-08, this proposed AD would retain all of the
requirements of AD 2018-13-08. Those requirements are referenced in
EASA AD 2021-0241, which, in turn, is referenced in paragraph (g) of
this proposed AD.

Related Service Information Under 1 CFR Part 51

EASA AD 2021-0241 describes procedures for repetitive special
detailed inspections for cracking of the radius of the front spar
vertical stringers, horizontal floor beam radius and fastener holes of
the front spear vertical stringers on frame 36. EASA AD 2021-0241
further describes procedures for repetitive high frequency eddy current
(HFEC) for cracking of the horizontal floor beam, repetitive HFEC
inspections for cracking of the fastener holes of the front spar
vertical stringers on FR 36, repetitive rototest inspections of the
fastener holes of the spar vertical stringers, and repair. EASA AD
2021-0241 also describes procedures for the modification of the center
wing box area. The modification is required for airplanes in
configuration 1, 2 or 3; and for airplanes in configuration 5, 6, or 7,
the modification is optional and is a terminating action for the
repetitive inspections when done within a specified time frame. The
modification includes related investigative and corrective actions.
Related investigative actions include an HFEC inspection on the radius
of the rib flanges, a rototest inspection of the fastener holes,
detailed and HFEC inspections for cracking on the cut edges, detailed
and rototest inspections on all open fastener holes, and an inspection
to determine if secondary structure brackets are installed. Corrective
actions include reworking the secondary structure bracket and repair.
This material is reasonably available because the interested parties
have access to it through their normal course of business

[[Page 24083]]

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 the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition described in the MCAI
referenced above. The FAA is proposing this AD because the FAA
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 AD Requirements

This proposed AD would require accomplishing the actions specified
in EASA AD 2021-0241 described previously, as incorporated by
reference, except for any differences identified as exceptions in the
regulatory text of this AD.

Explanation of Required Compliance Information

In the FAA's ongoing efforts to improve the efficiency of the AD
process, the FAA developed a process to use some civil aviation
authority (CAA) ADs as the primary source of information for compliance
with requirements for corresponding FAA ADs. The FAA has been
coordinating this process with manufacturers and CAAs. As a result, the
FAA proposes to incorporate EASA AD 2021-0241 by reference in the FAA
final rule. This proposed AD would, therefore, require compliance with
EASA AD 2021-0241 in its entirety through that incorporation, except
for any differences identified as exceptions in the regulatory text of
this proposed AD. Using common terms that are the same as the heading
of a particular section in EASA AD 2021-0241 does not mean that
operators need comply only with that section. For example, where the AD
requirement refers to ``all required actions and compliance times,''
compliance with this AD requirement is not limited to the section
titled ``Required Action(s) and Compliance Time(s)'' in EASA AD 2021-
0241. Service information required by EASA AD2021-0241 for compliance
will be available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and
locating Docket No. FAA-2022-0468 after the FAA final rule is
published.

Costs of Compliance

The FAA estimates that this proposed AD affects 1,549 airplanes of
U.S. registry. The FAA estimates the following costs to comply with
this proposed AD:

Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD 2018- Up to 273 work- $87,500............... Up to $110,705........ Up to
03-08. hours x $85 per $1,107,050 for
hour = $23,205. certain
airplanes.*
New proposed inspections..... 25 work-hours x $100.................. $2,225................ $3,446,525.
$85 per hour =
$2,125.
New proposed modification (5 Up to 403 work- Up to $316,900........ Up to $351,1555....... Up to
airplanes). hours x $85 per $1,755,775.
hour = $34,255.
----------------------------------------------------------------------------------------------------------------
* This estimate is based on the determination in AD 2018-13-08 that only 10 airplanes of U.S. registry needed to
accomplish all required actions, including the modification; other airplanes were only required to accomplish
the terminating actions.

Estimated Costs for Optional Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Up to 409 work-hours x $85 per hour = Up to $66,050..................... Up to $100,815.
$34,765.
----------------------------------------------------------------------------------------------------------------

The FAA has received no definitive data on which to base the cost
estimates for the on-condition actions specified in this proposed AD.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is 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

The FAA 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) Would not affect intrastate aviation in Alaska, and
(3) Would 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:

[[Page 24084]]

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:
0
a. Removing Airworthiness Directive (AD) 2018-13-08, Amendment 39-
19320; (83 FR 33809, July 18, 2018); and
0
b. Adding the following new AD:

Airbus SAS: Docket No. FAA-2022-0468; Project Identifier MCAI-2021-
01243-T.

(a) Comments Due Date

The FAA must receive comments on this airworthiness directive
(AD) by June 6, 2022.

(b) Affected ADs

This AD replaces AD 2018-13-08, Amendment 39-19320 (83 FR 33809,
July 18, 2018) (AD 2018-13-08).

This AD applies to the Airbus SAS airplanes identified in
paragraphs (c)(1) through (4) of this AD, certificated in any
category, as identified in European Union Aviation Safety Agency
(EASA) AD 2021-0241, dated November 8, 2021 (EASA AD 2021-0241).
(1) Model A318-111, -112, -121, and -122 airplanes.
(2) Model A319-111, -112, -113, -114, -115, -131, -132, and -133
airplanes.
(3) Model A320-211, -212, -214, -216, -231, -232, and -233
airplanes.
(4) Model A321-111, -112, -131, -211, -212, -213, -231, and -232
airplanes.

(d) Subject

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

(e) Reason

This AD was prompted by a report that, during a center fuselage
certification full-scale fatigue test, cracks were found on the
front spar vertical stringer at a certain frame. This AD was also
prompted by a determination that Model A321 airplanes that have
incorporated modification 160021 are also subject to the unsafe
condition. The FAA is issuing this AD to address fatigue cracking of
the front spar vertical stringers on the wings, which, if not
corrected, could result in the reduced structural integrity of the
airplane.

(f) Compliance

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

(g) Requirements

Except as specified in paragraph (h) of this AD: Comply with all
required actions and compliance times specified in, and in
accordance with, EASA AD 2021-0241.

(h) Exceptions to EASA AD 2021-0241

(1) Where EASA AD 2021-0241 refers to its effective date, this
AD requires using the effective date of this AD.
(2) The ``Remarks'' section of EASA AD 2021-0241 does not apply
to this AD.
(3) Where paragraph (3) of EASA AD 2021-0241 specifies actions
for airplanes repaired ``in accordance with instructions approved by
EASA or approved under Airbus DOA,'' for this AD use ``using a
method approved by the Manager, Large Aircraft Section,
International Validation Branch, FAA; or EASA; or Airbus SAS's EASA
DOA. If approved by the DOA, the approval must include the DOA-
authorized signature.''
(4) Where paragraph (4) of EASA AD 2021-0241 specifies to
``contact Airbus for approved corrective action instructions and
accomplish those instructions accordingly'' if cracks are detected,
for this AD if any cracking is detected, the cracking must be
repaired before further flight using a method approved by the
Manager, Large Aircraft Section, International Validation Branch,
FAA; or EASA; or Airbus SAS's EASA DOA. If approved by the DOA, the
approval must include the DOA-authorized signature.
(5) Where paragraph (8) of EASA AD 2021-0241 specifies actions
for airplanes inspected by additional instructions ``approved before
the effective date of this AD by Airbus DOA,'' for this AD use
``approved before the effective date of this AD by the Manager,
Large Aircraft Section, International Validation Branch, FAA; or
EASA; or Airbus SAS's EASA DOA. If approved by the DOA, the approval
must include the DOA-authorized signature.''

(i) No Reporting Requirement

Although the service information referenced in EASA AD 2021-0241
specifies to submit certain information to the manufacturer, this AD
does not include that requirement.

(j) Other FAA AD Provisions

The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
Large Aircraft Section, International Validation 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 responsible Flight
Standards Office, as appropriate. If sending information directly to
the Large Aircraft Section, International Validation Branch, send it
to the attention of the person identified in paragraph (k)(2) of
this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#2f16026e797c026e667d02181c1f026e62606c6f494e4e01484059">[email&#160;protected]</a>.
(i) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the responsible Flight Standards Office.
(ii) AMOCs approved previously for AD 2018-13-08 are approved as
AMOCs for the corresponding provisions of EASA AD 2021-0241 that are
required by paragraph (g) of this AD.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, Large Aircraft
Section, International Validation Branch, FAA; or 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): For any service information
referenced in EASA AD 2021-0241 that contains RC procedures and
tests: Except as required by paragraph (j)(2) of this AD, RC
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.

(k) Related Information

(1) For information about EASA AD 2021-0241, contact EASA,
Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221
8999 000; email <a href="/cdn-cgi/l/email-protection#99d8ddead9fcf8eaf8b7fcecebf6e9f8b7fcec">[email&#160;protected]</a>; internet www.easa.europa.eu. You
may find this EASA AD on the EASA website at <a href="https://ad.easa.europa.eu">https://ad.easa.europa.eu</a>. You may view this material at the FAA,
Airworthiness Products Section, Operational Safety Branch, 2200
South 216th St., Des Moines, WA. For information on the availability
of this material at the FAA, call 206-231-3195. This material may be
found in the AD docket on the internet at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-
2022-0468.
(2) For more information about this AD, contact Vladimir
Ulyanov, Aerospace Engineer, Large Aircraft Section, International
Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
phone 206-231-3229; email <a href="/cdn-cgi/l/email-protection#46302a27222f2b2f3468332a3f272829300620272768212930">[email&#160;protected]</a>.

Issued on April 15, 2022.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2022-08585 Filed 4-21-22; 8:45 am]
BILLING CODE 4910-13-P

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