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ADs updated daily at www.Tdata.com
PRATT & WHITNEY CANADA CORP:
Amendment 39-21226; Docket No. FAA-2020-0471; Project Identifier MCAI-2019-00126-E.
(a) EFFECTIVE DATE This AD is effective October 7, 2020. (b) AFFECTED ADS None. (c) APPLICABILITY This AD applies to Pratt & Whitney Canada Corp. (P&WC) PT6B-37A model turboshaft engines with engine serial number PCE-PU0289 and earlier, which do not have an installed fuel control unit (FCU) that incorporates a stainless steel air adapter using P&WC Service Bulletin (SB) No. PT6B-72-39107, Revision No. 1, dated December 13, 2017. (d) SUBJECT Joint Aircraft System Component (JASC) Code 7321, Fuel Control/Turbine Engines. (e) UNSAFE CONDITION This AD was prompted by a report of contamination from galvanic corrosion between the FCU aluminum body and the steel union fitting causing the loss of engine control, resulting in an engine over-speed condition and subsequent in-flight shutdown (IFSD). The FAA is issuing this AD to prevent failure of the FCU due to contamination from galvanic corrosion. The unsafe condition, if not addressed, could result in loss of engine control, failure of the engine, IFSD, and loss of the helicopter. (f) COMPLIANCE Comply with this AD within the compliance times specified, unless al- ready done. (g) REQUIRED ACTIONS Within the compliance time identified in Table 1 to paragraph (g) of this AD, replace the FCU with an FCU that incorporates the stainless steel air adapter using the Accomplishment Instruments, paragraphs 3.A. and 3.C., of P&WC SB No. PT6B-72-39107, Revision No. 1, dated December 13, 2017. TABLE 1 TO PARAGRAPH (G) – COMPLIANCE TIME REQUIREMENTS ______________________________________________________________________ COMPLIANCE TIME (A OR B, WHICHEVER OCCURS LATER AFTER THE EFFECTIVE DATE OF THIS AD) ______________________________________________________________________ A Before the FCU accumulates 1,500 flight hours, or before the FCU accumulates six years since new or last overhaul, whichever occurs first. B Within six months. ______________________________________________________________________ (h) CREDIT FOR PREVIOUS ACTIONS You may take credit for the replacement of the FCU that is required by paragraph (g) of this AD if you replaced the FCU with an FCU that incorporates a stainless steel air adapter before the effective date of this AD using P&WC SB No. PT6B-72-39107, Original Issue, dated December 15, 2016. (i) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS) (1) The Manager, ECO Branch, FAA, has the authority to approve AMOCs for this AD, 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 paragraph (j)(1) of this AD. You may email your request to: ANE-AD-AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal in- spector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office (j) RELATED INFORMATION (1) For more information about this AD, contact Mehdi Lamnyi, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7743; fax: 781-238-7199; email: Mehdi.Lamnyi@faa.gov. (2) Refer to Transport Canada Civil Aviation (Transport Canada) AD CF-2019 -05, dated February 19, 2019, for more information. You may examine the Transport Canada AD in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA-2020- 0471. (k) 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. 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. (P&WC) Service Bulletin No. PT6B-72-39107 Revision No. 1, dated December 13, 2017. (ii) [Reserved] (3) For P&WC service information identified in this AD, contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin, Longueuil, Quebec, Canada, J4G 1A1; phone: 800-268-8000; fax: 450-647-2888; website: https://www. pwc.ca/en/. (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 781-238-7759. (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: email@example.com, or go to: http://www.archives.gov/federal- register/cfr/ibr-locations.html. Issued on August 20, 2020. Lance T Gant, Director, Compliance & Airworthi- ness Division, Aircraft Certification Service. FOR FURTHER INFORMATION CONTACT: Mehdi Lamnyi, Aerospace Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 781-238- 7743; fax: 781-238-7199; email: Mehdi.Lamnyi@faa.gov.
DEPARTMENT OF TRANSPORTATION
Authority for This Rulemaking