[Docket No. FAA-2013-1059; Directorate Identifier 2013-NE-36-AD; Amendment 

39-18281; AD 2015-20-03] 

RlN 2120-AA64 

Airworthiness Directives; Pratt & Whitney Canada Corp. Turboprop Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. 

SUMMARY: We are superseding airworthiness directive (AD) 2014-14-02 for certain 

Pratt & Whitney Canada Corp. (P&WC) PW120, PW121, PW121A, PW124B, PW127, 

PW127E, PW127F, PW127G, and PW127M tmboprop engines. AD 2014-14-02 required 

removal of the 0-ring seal from the fuel manifold fitting. This new AD requires 

replacement of the fuel nozzle and the fuel manifold flow adapter. This AD was 

prompted by reports of fuel leaks at the interface between the fuel manifold and the fuel 

nozzle that resulted in engine fire. We are issuing this AD to correct the unsafe condition 

on these products. 

DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

The Director of the Federal Register approved the incorporation by reference of a 

certain publication listed in this AD as of[INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 
Park, Burlington, MA. For information on the availability of this material at the FAA, 

call 781-238-7125. It is also available on the Internet at http://www.regulations.gov by 

searching for and locating Docket No. FAA-2013-1059. 

Examining the AD Docket 

You may examine the AD docket on the Internet at http://www.regulations.gov by 

searching for and locating Docket No. F AA-2013-1 059; or in person at the Docket 

Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal 

holidays. The AD docket contains this AD, the mandatory continuing airworthiness 

information, regulatory evaluation, any comments received, and other information. The 

address for the Docket Office (phone: 800-647-5527) is Document Management Facility, 

U.S. Department of Transportation, Docket Operations, M-30, West Building Ground 

Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 01803; phone: 781-238-7146; fax: 781-238-

7199; email: barbara.caufield@faa.gov. 

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2014-14-02"). AD 2014-14-02 applied to certain P&WC PW120, PW121, PW121A, 

PW124B, PW127, PW127E, PW127F, PW127G, and PW127M turboprop engines. The 

NPRM published in the Federal Register on June 2, 2015 (80 FR 31325). The NPRM 

proposed to require replacement of the fuel nozzle and the fuel manifold flow adapter. 

Related Service Information under 1 CFR Part 51 

We reviewed P&WC SB No. PWl00-72-21861, dated November 21,2014, which 

identifies the final fuel nozzle configuration. 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 of this NPRM. 

Comments 

We gave the public the opportunity to participate in developing this AD. We 

received no comments on the NPRM (79 FR 39958, July 11, 2014) or on the 

determination ofthe cost to the public. 

Conclusion 

We reviewed the available data and determined that air safety and the public 

interest require adopting this AD as proposed. 

Costs of Compliance 

We estimate that this AD affects 150 engines installed on airplanes of U.S. 

registry. We also estimate that it will take about 2.5 hours per engine to comply with this 

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Title 49 of the United States Code specifies the FAA's 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 Agency's 

authority. 

We are issuing this rulemak:ing 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. 

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 that this AD: 

(1) Is not a "significant regulatory action" under Executive Order 12866, 

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( 4) 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 part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows: 

PART 39 -AIRWORTHINESS DIRECTIVES 

1. The authority citation for part 39 continues to read as follows: 

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

§ 39.13 [Amended] 

2. The FAA amends§ 39.13 by removing airworthiness directive (AD) 

2014-14-02], Amendment 39-17896 (79 FR 39958, July 11, 2014), and adding the 

following new AD: 

2015-20-03 Pratt & Whitney Canada Corp.: Amendment 39-18281; Docket 

No. FAA-2013-1059; Directorate Identifier 2013-NE-36-AD. 

(a) Effective Date 

This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

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This AD applies to Pratt & Whitney Canada Corp. (P&WC) PW120, PW121, and 

PW121A turboprop engines with post SB 21610 configuration; PW124B, PW127, 

PW127E, and PW127F turboprop engines with post SB 21607 configuration; PW127E 

and PW127F turboprop engines with serial numbers (SINs) PCE-EB0366 and earlier; 

PW127G turboprop engines with SINs PCE-AX0275 and earlier; and PW127M 

turboprop engines with SINs PCE-ED0810 and earlier. 

(d) Unsafe Condition 

This AD was prompted by reports of fuel seepage past the metal-to-metal sealing 

surfaces of the fuel nozzle and fuel manifold flow adapter. We are issuing this AD to 

prevent in-flight fuel leakage, engine fire, damage to the engine, and damage to the 

airplane. 

(e) Compliance 

Comply with this AD within the compliance times specified, unless already done. 

Within 1,500 flight hours after the effective date of this AD, or at the next engine shop 

visit, whichever occurs first: 

(1) Remove the 0-ring seal from the fuel manifold fitting, 

(2) Remove fuel manifold flow adapter, part numbers (PINs) 3059754-01, 

3059757-01, and 3059760-01; and 

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After the effective date of this AD, fuel manifold adapter, PINs 3059754-01, 

3059757-01, and 3059760-01, and fuel manifold gasket, PIN 3079354-01, are not eligible 

for installation in any engine. 

(g) Definition 

For the purpose of this AD, an engine shop visit is the induction of an engine into 

the shop for maintenance involving the separation of pairs of major mating engine 

flanges. The separation of engine flanges solely for the purpose of transportation without 

subsequent engine maintenance does not constitute an engine shop visit. 

(h) Alternative Methods of Compliance (AMOCs) 

The Manager, Engine Certification Office, FAA, may approve Al'v10Cs to this 

AD. Use the procedures found in 14 CFR 39.19 to make your request. You may email 

your request to: ANE-AD-AMOC@faa.gov. 

(i) Related Information 

(1) For more information about this AD, contact Barbara Caufield, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 01803; phone: 781-238-7146; fax: 

781-238-7199; email: barbara.caufield@faa.gov. 

(2) Refer to MCAI Transport Canada AD CF-2014-41, dated November 26, 2014, 

for related information. You may examine the MCAI in the AD docket on the Internet at 

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(IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) 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. Service Bulletin (SB) No. PW!00-72-21861, 

dated November 21,2014. 

(ii) Reserved. (3) For Pratt & Whitney Canada Corp. service information identified in this AD, 

contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin Blvd., Longueuil, Quebec, 

Canada, J4G !A!; phone: 800-268-8000; fax: 450-647-2888; Web site: www.pwc.ca. 

(4) You may view this service information at FAA, Engine & Propeller 

Directorate, 12 New England Executive Park, Burlington, MA. For information on the 

availability of this material at the FAA, call781-238-7125. 

(5) You may view this service information at the National Archives and Records 

Administration (NARA). For information on the availability of this material at NARA, 

call202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibrlocations.html. 

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Aircraft Certification Service. 

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