AD 69-12-03 took about a minute to find.
69-12-03 CESSNA: Amdt. 39-775. Applies to Models 310 (Serial Numbers 35000 thru 35546); 310A (Serial Numbers 38001 thru 38161); 310B (Serial Numbers 607; 35547, 35548, 35549, 35551 thru 35771); 310C (Serial Numbers 35550, 35772 thru 35999, 39001 thru 39031); 310D (Serial Numbers 39032 thru 39299); 310E (Serial Numbers 35912A, 310M0001 thru 310M0036); and 310F (Serial Numbers 310 0001 thru 310 0156) Airplanes.
Compliance: Required as indicated.
To prevent complete loss of engine power due to air being introduced into the fuel system should a fuel crossfeed line become chafed through by the firewall stiffener on the aft side of the aircraft firewall, unless already accomplished, perform the following: