AD 98-14-02

98-14-02 Pratt & Whitney Canada: Amendment 39-10636. Docket 97-ANE-33-AD. Applicability: Pratt & Whitney Canada (PWC) PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW124B, PW125B, PW126A, PW127, PW127E, PW127F series engines installed on but not limited to Dornier 328, Fokker 50, British Aerospace ATP, Aerospatiale ATR42, ATR42-500, ATR72, Embraer EMB-120, Canadair CL215T, CL415, and DeHavilland Dash-8-100/-200/-300/-315. Note 1: This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. Compliance: Required as indicated, unless accomplished previously. To prevent engine fuel leaks, which can result in inflight engine shutdowns or fire warnings, accomplish the following: (a) Remove the existing fuel manifold transfer tubes, transfer tube lock plates, and fuel manifold drain tubes in accordance with PWC Service Bulletin (SB) No. 21077, Revision 8, dated April 4, 1997. Remove the existing preformed packing in accordance with PWC SB No. 21364, Revision 1, dated April 28, 1995. Replace with fuel manifold transfer tubes in accordance with the following applicable PWC Service Bulletins (SBs): No. 21077, Revision 8, dated April 4, 1997, or No. 21516, dated August 14, 1997. Replace fuel manifold drain tubes in accordance with PWC SB No. 21549, dated September 18, 1997 or SB No. 21077, Revision 8, dated April 4, 1997. The modification must include installation of the improved lock plates in accordance with PWC SB No. 21373, Revision 3, dated October 11, 1996, and the preformed packing in accordance with PWC SB No. 21364, Revision 1, dated April 28, 1995, as follows, whichever occurs first following the effective date of this AD: (1) At the next engine removal, regardless of cause; or (2) At the next fuel nozzle change; or (3) Prior to November 30, 1998. (b) After the installation of the improved fuel manifold tubes and lockplates, but prior to further flight, perform a leak check in accordance with the applicable maintenance manual. (c) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Engine Certification Office. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Engine Certification Office. Note 2: Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Engine Certification Office. (d) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the aircraft to a location where the requirements of this AD can be accomplished. (e) The actions required by this AD shall be done in accordance with the following PWC SBs:

Document No Pages Revision Date 21077 1-9 8 April 4, 1997 Total Pages: 9.

21516 1-5 Original August 14, 1997 Total Pages: 5.

21549 1-4 Original September 18, 1997 Total Pages: 4.

21373 1-11 3 October 11, 1996 Total Pages: 11.

21364 1-8 1 April 28, 1995 Total Pages: 8.

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from Pratt & Whitney Canada, 1000 Marie-Victorin, Longueuil, Quebec, Canada J4G 1A1; telephone (514) 677-9411, fax (514) 647-3620. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street NW., suite 700, Washington, DC. (f) This amendment becomes effective on August 31, 1998.