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Federal Register / Vol. 86, No. 231 / Monday, December 6, 2021 / Rules and Regulations
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:
Steven Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287367; fax 5167945531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Background Transport Canada Civil Aviation TCCA, which is the aviation authority for Canada, has issued TCCA AD CF
202046, dated November 17, 2020
TCCA AD CF202046 also referred to after this as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain Bombardier, Inc., Model BD1001A10 airplanes. You may examine the MCAI in the AD
docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210691.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to certain Bombardier, Inc., Model BD1001A10 airplanes. The NPRM
published in the Federal Register on August 23, 2021 86 FR 47036. The NPRM was prompted by reports of erratic electrical system status on the PBAs and the EICAS. The NPRM
proposed to require revising the existing AFM to incorporate procedures to be
applied during erroneous electrical status indication conditions. The FAA is issuing this AD to address erroneous indications that could mislead pilots, causing them to turn off active electrical power sources, leading to partial or complete loss of electrical power. Loss of electrical power could result in the loss of flight displays and reduced controllability of the airplane. See the MCAI for additional background information.
Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public.
Conclusion The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for 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.
Related Service Information Under 1
CFR Part 51
Bombardier has issued the following sections of the applicable AFMs. This service information provides procedures to inform the pilots not to turn off active generators in the event of an erroneous electrical status indication.
Section 0319, Electrical, of Chapter 03, Emergency Procedures, of the Bombardier Challenger 300

Imperial Version Airplane Flight Manual, Publication No. CSP 1001, Revision 63, dated April 1, 2021. For obtaining this section of the Bombardier Challenger 300 Imperial Version Airplane Flight Manual, Publication No.
CSP 1001, use Document Identification No. CH 300 AFMI.
Section 0519, Electrical, of Chapter 05, Non-Normal Procedures, of the Bombardier Challenger 300
Imperial Version Airplane Flight Manual, Publication No. CSP 1001, Revision 63, dated April 1, 2021. For obtaining this section of the Bombardier Challenger 300 Imperial Version Airplane Flight Manual, Publication No.
CSP 1001, use Document Identification No. CH 300 AFMI.
Section 0319, Electrical, of Chapter 03, Emergency Procedures, of the Bombardier Challenger 350 Airplane Flight Manual, Publication No. CH 350
AFM, Revision 29, dated April 1, 2021.
Section 0519, Electrical, of Chapter 05, Non-Normal Procedures, of the Bombardier Challenger 350 Airplane Flight Manual, Publication No. CH 350
AFM, Revision 29, dated April 1, 2021.
These documents are distinct since they apply to different airplane configurations. This service information 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.
Costs of Compliance The FAA estimates that this AD
affects 275 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
1 work-hour $85 per hour = $85

$0

$85

$23,375

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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 44701: General requirements. Under that section, Congress charges the FAA
with promoting safe flight of civil
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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.
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
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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:
1 Is not a significant regulatory action under Executive Order 12866, 2 Will not affect intrastate aviation in Alaska, and 3 Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

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