Q.

Regarding gear-up accidents:

A. Pilots frequently lowered the landing gear instead of the flaps after take-off.
B. Lt. Alphonse Chapanis dicovered the cause of the problem in 1975.
C. The flap control knobs were replaced by beer tap handles.
D. Shape-coded wheel and flap controls are still used today.
Answer» D. Shape-coded wheel and flap controls are still used today.
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