2016-22-10: Centrifugal impeller

Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39--AIRWORTHINESS DIRECTIVES 0 1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. [[Page 75689]] Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2016-22-10 Turbomeca S.A.: Amendment 39-186990; Docket No. FAA-2016- 6990; Directorate Identifier 2016-NE-14-AD. (a) Effective Date This AD becomes effective December 6, 2016. (b) Affected ADs None. (c) Applicability This AD applies to certain Arriel 1, 1A, 1A1, 1A2, 1B, 1B2, 1C, 1C1, 1C2, 1D, 1D1, 1E, 1E2, 1K1, 1S, and 1S1 turboshaft engines, with modification TU376 installed. (d) Reason This AD was prompted by an anomaly that occurred during the grinding operation required by modification TU376,which increases the clearance between the rear curvic coupling of the centrifugal impeller and the fuel injection manifold. We are issuing this AD to prevent failure of the centrifugal impeller, uncontained centrifugal impeller release, damage to the engine, and damage to the helicopter. (e) Actions and Compliance Comply with this AD within the compliance times specified, unless already done. (1) Remove from service, any centrifugal impeller listed in Table 1 to paragraph (e) of this AD, before exceeding the applicable cycles since new (CSN) and replace with a centrifugal impeller not listed in Table 1 to paragraph (e) of this AD. Table 1 to Paragraph (e)--Centrifugal Impeller CSNs ------------------------------------------------------------------------ Part No. Serial No. CSN ------------------------------------------------------------------------ 0292254040...................................... 44 5,129 0292254040...................................... 1762FT 11,476 0292254050...................................... 1676CAR 6,281 0292254050...................................... 5333OTT 5,495 0292254050...................................... 5017OTT 5,491 0292254050...................................... 1136CAR 8,734 0292254050...................................... 3655OTT 4,600 0292254050...................................... 1757CAR 7,913 0292254050...................................... 1738CAR 10,640 0292254050...................................... 1149CAR 12,273 0292254050...................................... 2677OTT 11,145 0292254050...................................... 3109OTT 10,662 0292254050...................................... 3496OTT 5,562 0292254050...................................... 2074CAR 7,423 729225293A...................................... 290CAR6,326 729225293A...................................... 1227FT 8,139 729225293A...................................... 504FB 4,600 729225293A...................................... 2517OTT 9,732 729225293A...................................... 2165OTT 6,163 729225293A...................................... 2194FT 11,461 729225293A...................................... 1331OTT 12,513 729225293A...................................... 1301FT 7,262 729225293A...................................... 1567FT 6,305 729225293A...................................... 783FB 8,307 729225293A...................................... 98OTT 9,492 ------------------------------------------------------------------------ (2) Reserved. (f) Alternative Methods of Compliance (AMOCs) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR39.19 to make your request. You may email your request to: ANE-AD-AMOC@faa.gov. (g) Related Information (1) For more information about this AD, contact Philip Haberlen, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-7199; email: philip.haberlen@faa.gov. (2) Refer to MCAI, European Aviation Safety Agency AD 2016-0090, dated May 10, 2016, for more information. You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2016-6990. (h) Material Incorporated by Reference None.