2020-21-23: Stabilizers

Adoption of the Amendment \n\n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n0 1. The authority citation for part 39 continues to read as follows: \n\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n\n\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive: \n\n2020-21-23 Pilatus Aircraft Ltd.: Amendment 39-21296; Docket No. FAA-2020-0745; Project Identifier 2019-CE-030-AD. \n\n(a) Effective Date \n\n\n\tThis airworthiness directive (AD) is effective December 7, 2020. \n\n(b) Affected ADs \n\n\n\tNone. \n\n(c) Applicability \n\n\n\tThis 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 number (P/N) 555.10.12.139 marked with production order number FAUF 10169753, FAUF 10171067, or FAUF 10171267 installed. \n\n(d) Subject \n\n\n\tAir Transport Association of America (ATA) Code 55: Stabilizers. \n\n(e) Reason \n\n\n\tThis AD was prompted by a report of horizontal stabilizer rear attachment 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. \n\n(f) Actions and Compliance \n\n\n\t(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. \n\t(2) As of the effective date of this AD, do not install a horizontal stabilizer rear attachment bolt P/N 555.10.12.139 marked with production order number FAUF 10169753, FAUF 10171067, or FAUF 10171267 on any airplane. \n\n(g) Alternative Methods of Compliance (AMOCs) \n\n\n\tThe 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: [email protected]. Before using any approved AMOC, notify your appropriate principal inspector (PI), or lacking a PI, your local Flight Standards District Office. \n\n(h) Related Information \n\n\n\tRefer 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. \n\n(i) Material Incorporated by Reference \n\n\n\t(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. \n\t(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. \n\t(i) Pilatus Aircraft Ltd. PC-12 Service Bulletin No. 55-004, dated March 29, 2019. \n\t(ii) (Reserved) \n\t(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 \n\n((Page 69142)) \n\nStans, Switzerland; telephone: +41 (0)41 619 67 74; fax: +41 (0)41 619 67 73; email: aircraft.com">[email protected]. \n\t(4) You may view this service information at the FAA, Airworthiness Products 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. \n\t(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 protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. \n\n\n\tIssued on October 9, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2020-24047 Filed 10-30-20; 8:45 am) BILLING CODE 4910-13-P