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Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations maintenance manual AMM tasks referred to in Airbus SAS Service Bulletin A320251BQN, dated December 5, 2019; and Service Bulletin A320251BQP, dated December 5, 2019; are incorrect. The commenter stated that it contacted Airbus SAS
regarding this issue and Airbus SAS
response was that there is no planned revision to these service bulletins to correct the references to the incorrect AMM tasks.
The FAA agrees with the commenters request for the reason provided. The FAA has added paragraph h4 to this AD to allow use of the correct TAs.

tasks for doing the BITE built-in test equipment test of the ELT specified in the related Airbus SAS service bulletins.
These TAs are distinct since they apply to different service bulletins specified in EASA AD 20200103.
Airbus SAS TA 80724343/009/
2020, Issue 1, dated May 20, 2020.
Airbus SAS TA 80832689/007/
2020, Issue 2, dated October 29, 2020.
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.
Clarification of Maintenance Activities With an Affected Part
Request To Allow the Use of Additional Service Information
Conclusion The FAA reviewed the relevant data, considered the comment received, and determined that air safety and the public interest require adopting this final rule with the change described previously and minor editorial changes.
The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and Do not add any additional burden upon the public than was already proposed in the NPRM.
The FAA also determined that these changes will not increase the economic burden on any operator or increase the scope of this final rule.

American Airlines AA requested that operators be allowed to use the following Airbus SAS technical adaptations TAs during accomplishment of the related Airbus SAS service bulletins that are specified in EASA AD 20200103. The commenter noted that certain airplane
Related Service Information Under 1
CFR Part 51
EASA AD 20200103 describes procedures for modifying a certain ELT
by installing a diode in the airplane circuit connecting the ELT battery.
Airbus SAS has issued the following TAs, which specify the correct AMM

apply to all Airbus SAS Model A318
series airplanes; Model A319111, A319112, A319113, A319114, A319
115, A319131, A319132, A319133, A319151N, and A319153N airplanes;
Model A320 series airplanes; and Model A321 series airplanes. The NPRM
published in the Federal Register on October 1, 2020 85 FR 61884. The NPRM was prompted by the results of laboratory tests on non-rechargeable lithium batteries installed in ELTs, which highlighted a lack of protection against certain currents that could lead to thermal runaway and a battery fire.
The NPRM proposed to require modifying a certain ELT by installing a diode in the airplane circuit connecting the ELT battery, as specified in an EASA
AD.
The FAA is issuing this AD to address this unsafe condition, which could result in local temporary fires and could result in damage to the airplane and injury to occupants. See the MCAI
for additional background information.
Comments The FAA gave the public the opportunity to participate in developing this final rule. The following presents the comment received on the NPRM and the FAAs response.

EASA AD 20200103 defines an affected part as an ELT having part number P/N 01N65900. When the modification installation of a diode is completed, the part number of the ELT
does not change. The intent of paragraph 1 of EASA AD 20200103 is to require, for airplanes that have an affected ELT installed, operators to do the modification within 24 months. For these airplanes, operators can remove an ELT having P/N 01N65900 and reinstall that same part during maintenance activities within the 24 month compliance for doing the modification.
After the modification is done, operators can install an ELT having P/N
01N65900 as long as the modification is not removed.
Costs of Compliance The FAA estimates that this AD
affects 1,100 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
3 work-hours $85 per hour = $255

$450

$705

$775,500

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. The FAA does not control warranty coverage for affected individuals. As a result, the FAA has included all known costs in our cost estimate.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII:

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Aviation Programs, describes in more detail the scope of the Agencys 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
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unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
Regulatory Findings 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:

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