49-07-02: Fuel System Placard

49-07-02\tNORTH AMERICAN: Applies to Army BC-1A, AT-6, -6A, -6B, -6C: Navy SNJ-2, -3, -4 Aircraft. \n\n\tCompliance required not later than April 1, 1949. \n\n\tAccidents have occurred in the above model aircraft from engine stoppage on takeoffs and landings when operating on the left tank standpipe outlet with the fuel in the tank down to the level of the standpipe. \n\n\tSuch engine stoppages have occurred because pilots not fully familiar with the fuel system have misinterpreted the left tank fuel gage as indicating total available fuel quantity with selector valve on the Left Hand Main (standpipe) position, unaware that the change to Reserve or Right Hand Main position must be made before the fuel level in the left tank drops to 20 gallons. \n\n\tTo preclude the possibility of pilot error with regard to the foregoing, the following placard shall be installed in each cockpit: \n\n\t"CAUTION: Unless Left Tank is full, use Reserve or Right Tank for Takeoff and Landing."