AD 73-26-03

73-26-03 AIRESEARCH MANUFACTURING COMPANY OF ARIZONA: Amdt. 39-1758. Applies to Model TSE331-3U-303N engines. Compliance required as indicated. To detect abnormal wear of the fuel control drive consisting of the external splines of the fuel pump output shaft, P/N 868484; internal splines of the coupling, P/N 893646; and, the fuel control input shaft external splines, Woodward P/N 3499-034, accomplish the following after the effective date of this AD: (a) Within 25 hours additional time in service, or before accumulating 400 hours total time in service, whichever occurs later, unless previously accomplished within the last 375 hours time in service, and at intervals not to exceed 400 hours time in service thereafter, inspect the fuel control drive per the instructions of paragraph 2.c of AiResearch Service Bulletin TSE331-73-5006, dated October 26, 1973, or later FAA-approved revisions. (b) Within the next 25 hours time in service, unless already accomplished, adjust the fuel control overspeed governor minimum flow stop screw per instructions of paragraphs 2(H), and (I) of AiResearch Service Bulletin TSE331-73-5005, dated July 20, 1973, or later FAA-approved revisions. (c) Prior to installation of spare fuel controls, verify the accomplishment of the actions required by this AD per the instructions of the referenced Service Bulletins. (d) Equivalent procedures may be approved by the Chief, Aircraft Engineering Division, Western Region, upon submission of adequate substantiating data. This amendment becomes effective December 28, 1973.