Date:	May 29, 1947
Location:	Queens, New York
Aircraft:	Douglas C-54B
Reg:	NC30046
Airline:	United Air Lines
Flight No:	521
Fatalities:	48 : 43

The aircraft overran the runway during an attempted takeoff, crashed and caught fire. Either the failure of the pilot to release the gust lock before take-off or his decision to discontinue the take-off because of apprehension resulting from rapid use of a short runway under a possible calm wind condition.