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Federal Register / Vol. 86, No. 37 / Friday, February 26, 2021 / Proposed Rules
You may obtain further information by examining the MCAI in the AD
docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210103.
FAAs Determination This product has been approved by the aviation authority of Canada and is approved for operation in the United States. Pursuant to our bilateral agreement with Canada, Transport Canada has notified the FAA of the unsafe condition described in the MCAI
and service information. The FAA is issuing this AD because the agency evaluated all the relevant information provided by Transport Canada and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Pratt & Whitney Canada Corp. Alert Service Bulletin ASB No. PW21072A57142, Revision No. 1, dated March 26, 2020 ASB No.
PW21072A57142; and Pratt &
Whitney Canada Corp. ASB No.
PW21072A57143, Revision No. 1,
dated March 26, 2020 ASB No. PW210
72A57143. ASB No. PW21072
A57142 specifies procedures for calculating the correct, current LCF
cycle count for the impeller and HPC
rotor on PW210A model turboshaft engines. ASB No. PW21072A57143
specifies procedures for calculating the correct, current LCF cycle count for the impeller and HPC rotor installed on PW210S model turboshaft engines.
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.
Other Related Service Information The FAA reviewed Pratt & Whitney Canada Corp. Task 000000860801
and Task 000000860803 of Pratt &
Whitney Canada Corp. Engine Maintenance Manual EMM, Manual Part No. 30L2392, Airworthiness Limitations Section ALS, both at Revision 13, dated September 28, 2020.
Pratt & Whitney Canada Corp. Task 000000860801 of Pratt & Whitney Canada Corp. EMM, Manual Part No.
30L2392, identifies the LCF life limits for the impeller and HPC rotor. Pratt &
Whitney Canada Corp. Task 000000

860803 of Pratt & Whitney Canada Corp. EMM, Manual Part No. 30L2392, specifies procedures for manually calculating the correct, current LCF
cycle count for the impeller and HPC
rotor and provides the formula for manually calculating the accumulated total cycles for the impeller and HPC
rotor.
Proposed AD Requirements in This NPRM
This proposed AD would require the use of the manual LCF counting method in place of the ADTS counting method to determine the number of cycles accrued by the impeller and HPC rotor.
Interim Action The FAA considers that this proposed AD would be an interim action. If final action is later identified, the FAA might consider additional rulemaking.
Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 66
engines installed on helicopters of U.S.
registry.
The FAA estimates the following costs to comply with this proposed AD:

ESTIMATED COSTS
Action
Labor cost
Manually calculate LCF cycles

1 work-hour $85 per hour = $85

khammond on DSKJM1Z7X2PROD with PROPOSALS

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 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.

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.
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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Regulatory Findings
The Proposed Amendment
The FAA determined that this proposed AD would not have federalism
Accordingly, under the authority delegated to me by the Administrator,
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Cost per product
Parts cost $0

Cost on U.S.
operators
$85

$5,610

the FAA proposes to amend 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

Pratt & Whitney Canada Corp.: Docket No.
FAA20210103; Project Identifier MCAI202000604E.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by April 12, 2021.
b Affected ADs None.
c Applicability This AD applies to Pratt & Whitney Canada Corp. P&WC PW210A and PW210S model turboshaft engines.

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