AD 77-08-02

77-08-02 PIPER: Amendment 39-2874 as amended by Amendment 39-3074. Applies to PA-31, PA-31-300 and PA-31-325, S/Nos. 31-752 thru 31-7712010; PA-31-350, S/Nos. 31-5001 thru 31-7752028; PA-31P, S/Nos. 31P-67 thru 31P-7730001; PA-31T, S/Nos. 31T-7400002 thru 31T-7720008.

Compliance required within the next 50 hours in service after the effective date of this AD unless already accomplished.

To avoid an electrical short between the Pilot/Copilot Microphone and Phone Jack Relay and mounting bracket, comply as follows:

(a) Key both the pilot and copilot microphone at the same time. If you can transmit through the pilot's microphone, the subject relay is not installed in the aircraft and no further action is required.

(b) If the relay is installed, comply with the "Instructions" paragraph of Piper Service Bulletin No. 526A, dated July 25, 1977, or with an approved equivalent method.

Upon request with substantiating data submitted through an FAA Maintenance Inspector, the compliance time specified in this AD may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, who must also approve equivalent methods of compliance.

Amendment 39-2874 become effective April 20, 1977.

This amendment 39-3074 is effective November 15, 1977.