Page:CAB Accident Report, Mid-Air Collision on 30 September 1959.pdf/8

Rh After the Cessna 140 pilot received the warning from the tower not to land during the final approach, he leveled off, overtook the Aeronca L-16 which was descending, and collided with it.

The primary Causal factor in this accident was the failure of the North Philadelphia Airport traffic controller to effect accurate visual and timely verbal air traffic advisories to aid the pilots of the aircraft flying the traffic pattern.

Probable Cause

The Board determines the probable cause of this accident was the failure of FAA tower personnel to issue accurate visual and timely verbal air traffic advisories and the failure of the pilots of the two aircraft to maintain proper vigilance to avoid collision.

BY THE CIVIL AERONAUTICS BOARD.

/s/ ALAN S. BOYDChairman

/s/ ROBERT T. MURPHYVice Chairman

/s/ G. JOSEPH MINETTIMember

/s/ WHITNEY GILLILLANDMember

Chan Gurney, Member, did not take part in the adoption of this report.