Q. Regarding gear-up accidents: (Solved)
1. pilots frequently lowered the landing gear instead of the flaps after take- off.
2. lt. alphonse chapanis dicovered the cause of the problem in 1975.
3. the flap control knobs were replaced by beer tap handles.
4. shape-coded wheel and flap controls are still used today.
- d. shape-coded wheel and flap controls are still used today.