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Federal Register / Vol. 86, No. 117 / Tuesday, June 22, 2021 / Proposed Rules
airplanes; Model A320111, 211, 212, 214, 231, 232, and 233 airplanes;
and Model A321111, 112, 131, 211, 212, 213, 231, and 232 airplanes.
AD 20132511 requires repetitive inspections of the 80VU rack lower lateral fittings, upper fittings, and shelves for damage, repetitive inspections of the 80VU rack lower central support for cracking, and corrective action if necessary. AD 2013
2511 also specifies optional terminating action for the repetitive inspections. The FAA issued AD 2013
2511 to address damage or cracking of the 80VU fittings and supports, which could lead to possible disconnection of the cable harnesses to one or more computers, and if occurring during a critical phase of flight, could result in reduced control of the airplane.

lotter on DSK11XQN23PROD with PROPOSALS1

Actions Since AD 20132511 Was Issued Since the FAA issued AD 201325
11, new damage was reported on airplanes that had accomplished the actions specified in Airbus Service Bulletin A320531215 and Airbus Service Bulletin A320251557, which AD 20132511 specified as optional terminating action for the repetitive inspections. Damage was also found on airplanes on which Airbus mod 34804
which provides the same modifications specified in Airbus Service Bulletin A320531215 and Airbus Service Bulletin A320251557 was embodied.
Additional airplane models have also been determined to be subject to the unsafe condition. The FAA has therefore determined that new repetitive inspections of the 80VU rack are necessary to address the unsafe condition, and the applicability needs to be revised to include the additional airplane models.
EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20210045, dated February 16, 2021 EASA AD
20210045 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all Airbus SAS
Model A318111, A318112, A319111, A319112, A319113, A319114, A319
115, A319131, A319132, A319133, A320211, A320212, A320214, A320
215, A320216, A320231, A320232, A320233, A321111, A321112, A321

131, A321211, A321212, A321213, A321231 and A321232 airplanes.
EASA AD 20210045 supersedes EASA
AD 20120134 which corresponds to FAA AD 20132511. Model A320215
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 reports of damaged lower lateral fittings of the 80VU rack, and reports of new damage on airplanes on which certain optional service information had been accomplished. The FAA is proposing this AD to address damage or cracking of the 80VU fittings and supports, which could lead to possible disconnection of the cable harnesses to one or more computers, and if occurring during a critical phase of flight, could result in reduced control of the airplane.
See the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20210045 describes procedures for repetitive special detailed inspections of the 80VU rack lower lateral fittings, lower central support, upper fittings, central post, and shelves attachments for discrepancies including broken fittings, missing bolts, an electronics rack FIN 80VU that is in contact with structure, any bush that has migrated, burred material, and cracks, and corrective action if necessary. Corrective actions include modification, repair, and replacement.
EASA AD 20210045 also describes procedures for reporting inspection results to Airbus.
This material 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.
FAAs 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 FAAs 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 20210045 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 FAAs ongoing efforts to improve the efficiency of the AD
process, the FAA initially worked with Airbus and EASA to develop a process to use certain EASA ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has since coordinated with other manufacturers and civil aviation authorities CAAs to use this process. As a result, EASA AD
20210045 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with EASA AD 20210045
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 the EASA AD 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 Actions and Compliance Times in the EASA AD. Service information specified in EASA AD
20210045 that is required for compliance with EASA AD 20210045
will be available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210506 after the FAA final rule is published.
Costs of Compliance The FAA estimates that this proposed AD affects 1,528 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Retained actions from AD 201325
11.

87 work-hours $85 per hour =
$7,395.

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Parts cost
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Cost per product
$2,592

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Cost on U.S.
operators $9,987

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$15,260,136