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Federal Register / Vol. 86, No. 148 / Thursday, August 5, 2021 / Rules and Regulations
changes to procedures or tests identified as RC require approval of an AMOC.

Federal Aviation Administration
j Related Information For more information about this AD, contact Kathleen Arrigotti, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198;
telephone and fax 2062313218; email kathleen.arrigotti@faa.gov.
k Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.
i European Union Aviation Safety Agency EASA AD 20210004, dated January 6, 2021.
ii Reserved 3 For EASA AD 20210004, contact EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; telephone +49 221 8999
000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this 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. FAA20210343.
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 July 14, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202116560 Filed 8421; 8:45 am
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DEPARTMENT OF TRANSPORTATION

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14 CFR Part 39
Docket No. FAA20210019; Project Identifier MCAI202001388T; Amendment 3921649; AD 20211502
RIN 2120AA64

Airworthiness Directives; Airbus Canada Limited Partnership Type Certificate Previously Held by C Series Aircraft Limited Partnership CSALP;
Bombardier, Inc. Airplanes Federal Aviation Administration FAA, Department of Transportation DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Airbus Canada Limited Partnership Model BD5001A10 and BD500
1A11 airplanes. This AD was prompted by reports of deficiencies in the primary flight control computer PFCC software and the remote electronics unit REU
software. This AD requires installation of a software update to correct deficiencies in the PFCC and REU
software, as specified in a Transport Canada Civil Aviation TCCA AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective September 9, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of September 9, 2021.
ADDRESSES: For TCCA material incorporated by reference IBR in this AD, contact TCCA, Transport Canada National Aircraft Certification, 159
Cleopatra Drive, Nepean, Ontario K1A
0N5, Canada; telephone 8886633639;
email AD-CN@tc.gc.ca; internet https
tc.canada.ca/en/aviation. 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 2062313195.
It is also available in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0019.
For the Airbus Canada material identified in this AD that is not incorporated by reference, contact Bombardier, Inc., 400 Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada;
telephone 5148555000; fax 514855
SUMMARY:

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7401; email thd.crj@
aero.bombardier.com; internet https
www.bombardier.com.
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. FAA2021
0019; 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:
Thomas Niczky, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516
2287347; fax 5167945531; email 9avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Background TCCA, which is the aviation authority for Canada, has issued TCCA AD CF
202036, dated October 8, 2020 TCCA
AD CF202036 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain Airbus Canada Limited Partnership Model BD
5001A10 and BD5001A11 airplanes.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to certain Airbus Canada Limited Partnership Model BD5001A10 and BD5001A11 airplanes. The NPRM
published in the Federal Register on February 24, 2021 86 FR 11178. The NPRM was prompted by reports of deficiencies in the PFCC and REU
software. The NPRM proposed to require installation of a software update to correct deficiencies in the PFCC and REU software, as specified in TCCA AD
CF202036.
The FAA is issuing this AD to address software deficiencies that, if not corrected, could impact flight control functions, which could prevent continued safe flight and landing. 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 comments received on the NPRM
and the FAAs response to each
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