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Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations
EASA AD on the EASA website at https
ad.easa.europa.eu.
4 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 2062313195. This material may be found in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA20200673.
5 You may view this material that is incorporated by reference at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email fedreg.legal@
nara.gov, or go to: https www.archives.gov/
federal-register/cfr/ibr-locations.html.
Issued on January 14, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202103594 Filed 22221; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20200580; Product Identifier 2020NM052AD; Amendment 3921389; AD 20210206
RIN 2120AA64

Airworthiness Directives; The Boeing Company Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is superseding Airworthiness Directive AD 201902
03, which applied to all The Boeing Company Model 7878, 7879, and 78710 airplanes. AD 20190203
required revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations.
This AD retains the requirements of AD
20190203 and requires incorporation of an airworthiness limitation that applies only to certain airplanes. This AD also requires replacing or modifying certain engine fire control panels, which terminates the revised airworthiness limitation added in this final rule when a certain condition is met. Since the FAA issued AD 20190203, the manufacturer has developed a new fire handle design that will eliminate the need for the airworthiness limitations required by AD 20190203. The FAA
is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective March 30, 2021.
SUMMARY:

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The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of March 30, 2021.
ADDRESSES: For service information identified in this final rule, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services C&DS, 2600 Westminster Blvd., MC
110SK57, Seal Beach, CA 907405600;
telephone 5627971717; internet https www.myboeingfleet.com. You may view this service information 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 2062313195.
It is also available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20200580.
Examining the AD Docket You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0580; 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 final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Tak Kobayashi, Aerospace Engineer, Propulsion Section, FAA, Seattle ACO
Branch, 2200 South 216th St., Des Moines, WA 98198; phone and fax: 206
2313553; email: takahisa.kobayashi@
faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 to supersede AD 20190203, Amendment 3919550 84 FR 2437, February 7, 2019 AD 20190203. AD
20190203 applied to all The Boeing Company Model 7878, 7879, and 78710 airplanes. The NPRM published in the Federal Register on July 15, 2020
85 FR 42749. The NPRM was prompted by reports of warpage of internal engine fire handle components that can cause binding and prevent proper operation, and by the development of a new fire handle design that will eliminate the need for the airworthiness limitations required by AD 20190203. The NPRM
proposed to retain the requirements of
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AD 20190203 and to require incorporation of an airworthiness limitation that applies only to certain airplanes. The NPRM also proposed to require replacing or modifying certain engine fire control panels, which would terminate the revised airworthiness limitation added in this final rule when a certain condition is met. The FAA is issuing this AD to address a latent failure of the engine fire handle, which could result in the inability to extinguish an engine fire that, if uncontrollable, could lead to wing failure.
Comments The FAA gave the public the opportunity to participate in developing this AD. The following presents the comments received on the NPRM and the FAAs response to each comment.
Request To Expand Approved Alternative Methods of Compliance AMOCs Boeing asked that paragraph o4 of the proposed AD paragraph p4 of this AD, which specifies AMOCs approved previously for AD 20190203
are approved as AMOCs for the corresponding provisions of paragraph g of this AD, also include approval of AMOCs for the corresponding provisions of paragraph k of the proposed AD. Boeing stated that approved AMOC RA1900263 Boeing letter requesting an AMOC for AD 2019
0203 provides inspection instructions equivalent to Airworthiness Limitation 28AWLFIRE in figure 1 to paragraph g of the proposed AD. Boeing added that the inspection instructions of 28
AWLFIRE in figure 1 to paragraph g of the proposed AD and in figure 2 to paragraph k of the proposed AD are identical.
The FAA partially agrees with the commenters request. The FAA
previously approved Boeing Alert Requirements Bulletin B78781205
SB26000700 RB, Issue 001, dated February 22, 2019, as an AMOC to the requirements of paragraph g of AD
20190203. The inspection instructions provided in Boeing Alert Requirements Bulletin B78781205
SB26000700 RB, Issue 001, dated February 22, 2019, are equivalent to 28
AWLFIRE in figure 1 to paragraph g of this AD and in figure 2 to paragraph k of this AD. Because paragraph k is a new requirement of this AD, the FAA
has instead added the action as an alternative terminating action, paragraph l of this AD, for the repetitive inspections for airplanes equipped with an engine fire control panel having part number P/N

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