AD 68-13-01

68-13-01 PIPER: Amendment 39-613. Applies to PA-31 and PA-31-300 type Aircraft Serial Numbers 31-2 through 31-220 inclusive 31-222, 31-223, 31-225, 31-228, 31-234, 31-237, 31-238, 31-240, 31-242 and 31-243.

To preclude in-flight fire attributed to arcing from electrical wires to the fuel crossfeed line behind the fuel control panel in the cockpit accomplish the following within the next (5) hours time in service after the effective date of this airworthiness directive unless already accomplished.

A. Remove fuel control panel cover assembly P/N 41448-00 and inspect all wiring for chafing or interference at the fuel crossfeed line, the spar structure and the fuel control cable. Also inspect for chafing of the fuel crossfeed line against the spar structure and the P/N 41448-00 cover. Replace all chafed wires and any fuel crossfeed line chafed or worn in excess of 10 per cent (approximately .003 inch) of the wall thickness.

B. Reroute wiring and secure fuel crossfeed line to assure adequate clearance in accordance with Piper Service Bulletin No. 278 (Kit No. 760216) or later FAA approved revision or in accordance with an FAA approved equivalent modification. (Piper Service Bulletin No. 278 dated May 27, 1968 covers this subject).

This amendment is effective June 25, 1968 and was effective upon receipt for all recipients of the telegram dated May 29, 1968 which contained this amendment.