49-07-03 CONVAIR: Applies to All BT-13 Series Aircraft.
Compliance required not later than April 1, 1949.
Several accidents have occurred in the above model aircraft from engine stoppage on take-offs and landings when operating on the right tank standpipe outlet with the fuel in the tank down to the level of the standpipe.
Such engine stoppages have occurred because pilots not fully familiar with the fuel system have misinterpreted the right tank fuel gage as indicating total available fuel quantity with selector valve on Right Hand Main (standpipe) position, unaware that the change to Reserve or Left Hand Main position must be made before the fuel level in the right tank drops to 17 gallons.
To preclude the possibility of pilot error with regard to the foregoing, the following placard shall be installed with each cockpit:
"CAUTION: Unless Right Tank is full, use Reserve or Left Tank for Takeoff and Landing."