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2020-21-23 |
PILATUS AIRCRAFT LTD.: Amendment 39-21296; Docket No. FAA-2020-0745; Project Identifier 2019-CE-030-AD. |
(a) EFFECTIVE DATE This airworthiness directive (AD) is effective December 7, 2020. (b) AFFECTED ADS None. (c) APPLICABILITY This AD applies to Pilatus Aircraft Ltd. Models PC-12, PC-12/45, PC- 12/47 and PC-12/47E airplanes, all serial numbers, certificated in any category, with a horizontal stabilizer rear attachment bolt part num- ber (P/N) 555.10.12.139 marked with production order number FAUF 10169753, FAUF 10171067, or FAUF 10171267 installed. (d) SUBJECT Air Transport Association of America (ATA) Code 55: Stabilizers. (e) REASON This AD was prompted by a report of horizontal stabilizer rear attach- ment bolts that had not received correct heat treatment during the manufacturing process. The FAA is issuing this AD to prevent fatigue failure of a bolt and subsequent loss of airplane control. (f) ACTIONS AND COMPLIANCE (1) Within 1,350 hours time-in-service after the effective date of this AD or within 13 months after the effective date of this AD, whichever occurs first, replace each horizontal stabilizer rear attachment bolt P/N 555.10.12.139 marked with production order number FAUF 10169753, FAUF 10171067, or FAUF 10171267 by following the Accomplishment Instructions, section 3.B.(2) through (4) and figures 1 and 2, of Pilatus PC-12 Service Bulletin No. 55-004 dated March 29, 2019, except you are not required to return parts to the manufacturer. (2) As of the effective date of this AD, do not install a horizontal stab- ilizer rear attachment bolt P/N 555.10.12.139 marked with production order number FAUF 10169753, FAUF 10171067 or FAUF 10171267 on any air- plane. (g) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS) The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to ATTN: Doug Rudolph, Aerospace Engineer, FAA, General Aviation & Rotorcraft Section, International Validation Branch, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4059; fax: (816) 329-4090; email: doug.rudolph@ faa.gov. Before using any approved AMOC, notify your appropriate prin- cipal inspector (PI), or lacking a PI, your local Flight Standards District Office. (h) RELATED INFORMATION Refer to European Union Aviation Safety Agency (EASA) AD No. 2019-0129 dated June 6, 2019, for more information. You may examine the EASA AD in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2020-0745. (i) 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) Pilatus Aircraft Ltd. PC-12 Service Bulletin No. 55-004, dated March 29, 2019. (ii) [Reserved] (3) For Pilatus Aircraft Ltd. service information identified in this AD, contact Pilatus Aircraft Ltd., Customer Technical Support (MCC), P.O. Box 992, CH-6371 Stans, Switzerland; telephone: +41 (0)41 619 67 74; fax: +41 (0)41 619 67 73; email: Techsupport@pilatus-aircraft.com. (4) You may view this service information at the FAA, Airworthiness Prod- ucts Section, Operational Safety Branch, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call (816) 329-4148. (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 October 9, 2020. Lance T. Gant, Director, Compliance & Airworth- iness Division, Aircraft Certification Service. FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aerospace Engineer, General Aviation & Rotorcraft Section, International Validation Branch, 901 Locust Room 301, Kansas City, Missouri 64106; phone: (816) 329-4059; fax: (816) 329-4090; email: doug.rudolph@faa.gov.
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