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Federal Register / Vol. 86, No. 171 / Wednesday, September 8, 2021 / Proposed Rules the engine EFP installation, and repair if necessary. These documents are distinct since they apply to different airplane serial numbers.
Bombardier Service Bulletin 604
28024, dated June 16, 2020.
Bombardier Service Bulletin 650
28002, dated June 16, 2020.
Bombardier Service Bulletin 605
28012, dated June 16, 2020.
This proposed AD would also require Bombardier Service Bulletin 60428
022, dated October 19, 2015, and Bombardier Service Bulletin 60528
010, dated October 19, 2015, which the Director of the Federal Register approved for incorporation by reference as of November 30, 2017 82 FR 49498, October 26, 2017.
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.

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 and service information 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 on other products of the same type design.
Proposed Requirements of This NPRM
This proposed AD would retain all of the requirements of AD 20172206 and require accomplishing the actions specified in the service information described previously, except as discussed under Difference Between this Proposed AD and the MCAI.
Difference Between This Proposed AD
and the MCAI
Paragraph E.1. of TCCA AD CF2016
32R4, for airplane serial numbers 6125
through 6163, requires inspecting for
FAAs Determination This product has been approved by the aviation authority of another
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fuel leaks within 600 hours or 12
months, whichever occurs first after the date of aeroplane entry in-service.
Paragraph i of this proposed AD, however, would require compliance for those airplanes within 600 flight hours or 12 months, whichever occurs first after the effective date of this FAA
AD. Paragraph D.1. of TCCA AD CF
201632R4 requires compliance for this action for other serial numbers within 600 flight hours or 12 months after the effective date of the AD. The FAA has determined that the risk is not higher for serial numbers 6125 through 6163
compared with the other identified airplanes required to accomplish the same inspection. Therefore, for this AD, the compliance time is the same for all airplanes that are required to inspect for fuel leaks.
Costs of Compliance The FAA estimates that this proposed AD affects 128 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Action
Labor cost
Retained actions from AD 2017-22-06
for 121 airplanes.
New proposed actions

Parts cost
1 work-hour $85 per hour = $85.
20 work-hours $85 per hour = $1,700.

The FAA estimates the following costs to do any necessary repair that
Cost per product
Cost on U.S. operators
$0

$85 per inspection cycle

1,768

$3,468

would be required based on the results of any required actions. The FAA has no
$10,285 per inspection cycle.
$443,904.

way of determining the number of aircraft that might need this repair:

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per product
5 work-hours $85 per hour = $425

$8,618

$9,043

jbell on DSKJLSW7X2PROD with PROPOSALS

According to the manufacturer, some or all of the costs of this proposed AD
may be covered under warranty, thereby reducing the cost impact on affected operators. The FAA does not control warranty coverage for affected operators.
As a result, the FAA has included all known costs in the 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:
Aviation Programs, describes in more detail the scope of the Agencys authority.
The FAA is issuing this rulemaking under the authority described in
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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 unsafe condition that is likely to exist or develop on products identified in this rulemaking action.
Regulatory Findings The FAA has 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
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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 this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would 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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