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Federal Register / Vol. 86, No. 148 / Thursday, August 5, 2021 / Rules and Regulations
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 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 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 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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

d Subject Joint Aircraft System Component JASC
Code 7230, Turbine Engine Compressor Section.
e Unsafe Condition This AD was prompted by a report from the manufacturer that the Automated Damage Tracking System ADTS may under-count the number of cycles accrued by the impeller and the high-pressure compressor HPC
rotor, which could result in the failure of these components. The FAA is issuing this AD to prevent failure of the impeller and the HPC rotor. The unsafe condition, if not addressed, could result in the uncontained release of the impeller or the HPC rotor, damage to the engine, damage to the helicopter, and loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions Before exceeding 7,000 starts or 14,000
flight cycles since new on the affected engine, or prior to removal of the engine from the aircraft for the purpose of sending the engine to a repair or overhaul facility, whichever occurs first after the effective date of this AD:
1 Use the manual low-cycle fatigue LCF
counting method to determine the accumulated LCF cycles for the impeller and the HPC rotor using paragraph 3.A., Accomplishment Instructions, of P&WC Alert Service Bulletin ASB No. PW21072
A57142, Revision No. 1, dated March 26, 2020, or P&WC ASB No. PW21072A57143, Revision No. 1, dated March 26, 2020, as applicable for the engine model.
2 After performing the actions required by paragraph g1 of this AD, use the manual LCF counting method specified in paragraph g1 of this AD to count subsequent LCF cycles on the impeller and HPC rotor. Do not use the ADTS to count subsequent LCF cycles on the impeller or the HPC rotor.
h Definition For the purpose of this AD, a start is an engine start followed by one or more flights.

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

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c Applicability This AD applies to Pratt & Whitney Canada Corp. P&WC PW210A and PW210S model turboshaft engines.

i No Reporting Requirement
20211512 Pratt & Whitney Canada Corp.:
Amendment 3921659; Docket No.
FAA20200103; Project Identifier MCAI202000604E.

The reporting requirement specified in the Accomplishment Instructions, paragraph 3.A.4., of P&WC ASB No. PW21072
A57142, Revision No. 1, dated March 26, 2020, and paragraph 3.A.4., of P&WC ASB
No. PW21072A57143, Revision No. 1, dated March 26, 2020, is not required by this AD.

a Effective Date This airworthiness directive AD is effective September 9, 2021.
b Affected ADs
1 The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD,
None.

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16:02 Aug 04, 2021

j Alternative Methods of Compliance AMOCs
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if requested using the procedures found in 14
CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the ECO Branch, send it to the attention of the person identified in Related Information.
2 Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/
certificate holding district office.
k Related Information 1 For more information about this AD, contact Barbara Caufield, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781
2387146; fax: 781 2387199; email:
barbara.caufield@faa.gov.
2 Refer to Transport Canada Civil Aviation TCCA AD CF202013, dated April 28, 2020, for more information. You may examine the TCCA AD in the AD docket at https www.regulations.gov by searching for and locating Docket No. FAA20200103.
l 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 the AD specifies otherwise.
i Pratt & Whitney Canada Corp. P&WC
Alert Service Bulletin ASB No. PW21072
A57142, Revision No. 1, dated March 26, 2020.
ii P&WC ASB No. PW21072A57143, Revision No. 1, dated March 26, 2020.
3 For P&WC service information identified in this AD, contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, J4G 1A1 Canada; phone:
800 2688000.
4 You may view this service information at FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call 781 2387759.
5 You may view this service information 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 15, 2021.
Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202116544 Filed 8421; 8:45 am BILLING CODE 491013P

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