Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 89 / Tuesday, May 11, 2021 / Proposed Rules Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all:
Airbus SAS Model A318111, 112, 121, and 122 airplanes;
Airbus SAS Model A319111, 112, 113, 114, 115, 131, 132, 133, 151N, 153N, and 171N airplanes;
Airbus SAS Model A320211, 212, 214, 215, 216, 231, 232, 233, 251N, 252N, 253N, 271N, 272N, and 273N airplanes;
Airbus SAS Model A321111, 112, 131, 211, 212, 213, 231, 232, 251N, 251NX, 252N, 252NX, 253N, 253NX, 271N, 271NX, 272N, and 272NX airplanes;
Airbus SAS Model A330201, 202, 203, 223, 223F, 243, 243F, 301, 302, 303, 321, 322, 323, 341, 342, 343, 743L, 841, and 941
airplanes;
Airbus SAS Model A340211, 212, 213, 311, 312, 313, 541, 542
642, and 643 airplanes; and Airbus SAS Model A380841, 842, and 861 airplanes.
Airbus SAS Model A320215, A330
743L, A340542, and A340643
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 repetitive disconnection and reconnection of certain Ni-Cd batteries during airplane parking or storage could lead to a reduction in capacity of those batteries. The FAA is proposing this AD to address reduced capacity of certain Ni-Cd batteries, which could lead to reduced battery endurance performance and possibly result in failure to supply the minimum essential electrical power during abnormal or emergency conditions. See
the MCAI for additional background information.
Related Service Information Under 1
CFR Part 51
EASA AD 20200274 describes procedures for replacing certain affected Ni-Cd batteries with serviceable Ni-Cd batteries, or maintaining the electrical storage capacity of those Ni-Cd batteries during airplane storage or parking.
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 the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design.
Proposed AD Requirements This proposed AD would require accomplishing the actions specified in EASA AD 20200274 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

25811

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
20200274 will be incorporated by reference in the FAA final rule. This proposed AD would, therefore, require compliance with EASA AD 20200274
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
20200274 that is required for compliance with EASA AD 20200274
will be available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210350 after the FAA final rule is published.
Costs of Compliance The FAA estimates that this proposed AD affects 1,814 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
5 work-hours $85 per hour = $425

$0

$425

$770,950

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:
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
VerDate Sep<11>2014

16:39 May 10, 2021

Jkt 253001

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.

PO 00000

Frm 00003

Fmt 4702

Sfmt 4702

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.

E:FRFM11MYP1.SGM

11MYP1