2018-13-01: Turbine Governor

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. Sec. 39.13 [Amended] 0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive (AD): 2018-13-01 Roll-Royce Corporation (Type Certificate previously held by Allison Engine Company): Amendment 39-19313; Docket No. FAA-2017- 1118; Product Identifier 2017-NE-40-AD. (a) Effective Date This AD is effective August 16, 2018. (b) Affected ADs None. (c) Applicability This AD applies to Rolls-Royce Corporation (RRC) model 250-C10D, 250-C18, 250-C18A, 250-C18B, 250-C18C, 250-C19, 250-C20, 250-C20B, 250-C20C, 250-C20F, 250-C20J, 250-C20R, 250-C20R/1, 250-C20R/2, 250- C20R/4, 250-C20S, 250-C20W, 250-C28, 250-C28B, 250-C28C, 250-C30, 250-C30G, 250-C30G/2, 250-C30M, 250-C30P, 250-C30S, and 250-C30U turboshaft engines with power turbine governor (PTG) bearing assembly, part number (P/N) 2544198, installed. (d) Subject Joint Aircraft System Component (JASC) Code 7323, Turbine Governor. (e) Unsafe Condition This AD was prompted by several reports of loss of power, one of which resulted in a fatal helicopter accident. We are issuing this AD to prevent failure of the PTG bearing assembly. The unsafe condition, if not addressed, could result in failure of the PTG, failure of the engine, in-flight shutdown, and forced autorotation landing or accident. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Remove the bearing assembly, P/N 2544198, from the PTG in accordance with the compliance times in Figure 1 to paragraph (g) of this AD, or within 90 days after the effective date of this AD, whicheveroccurs later. [GRAPHIC] [TIFF OMITTED] TR12JY18.017 (2) After such removal, replace the affected PTG bearing assembly with a part eligible for installation before further flight. (h) Installation Prohibition After the effective date of this AD, do not install PTG bearing assembly, P/N 2544198, on any engine. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, Chicago ACO 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 Chicago ACO Branch, send it to the attention of the person identified in paragraph (j) of this AD. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (j) Related Information For more information about this AD, contact John Tallarovic, Aerospace Engineer, [[Page 32206]] Chicago ACO Branch, FAA, 2300 E Devon Ave., Des Plaines, IL 60018; phone: 847-294-8180; fax: 847-294-7834; email: john.m.tallarovic@faa.gov. (k) Material Incorporated by Reference None.