78-05-02 AIRESEARCH MANUFACTURING COMPANY OF ARIZONA: Amendment 39-3145 as amended by amendment 39-3445. Applies to AiResearch Model TPE331-1, -2, -3, -5, and -6 Series engines.
Compliance required as indicated.
To prevent failure of the propeller pitch control cam follower pin accomplish the following:
(1) Within the next 500 hours time in service after April 1, 1978 or prior to September 30, 1979, or at next engine overhaul, whichever comes first, unless already accomplished, remove propeller pitch control sleeve assembly Part Number 869647-1, -2, or -3 from the engine and replace it with a serviceable propeller pitch control sleeve assembly Part Number 869647-4 or other later FAA approved sleeve assembly in accordance with AiResearch Service Bulletin TPE331-72-0115, Revision 1, dated September 26, 1977, or later FAA approved revisions, or by equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region.
(2) Special flight permits may be issued per FAR 21.197 and 21.199 to authorize operation of aircraft to a base where this modification required by this AD may be performed.
Amendment 39-3145 became effective April 1, 1978.
This amendment 39-3445 becomes effective April 5, 1979.