unflyable
/ʌnˈflaɪəbəl/
adjective
- Not able to be flown; unsuitable for flying, usually because of damage, bad weather, or poor design.
- The storm made the small plane unflyable until the winds died down.
- The drone became unflyable when its propeller broke mid-flight.
- After the engine failure, the aircraft was declared unflyable and sent for repairs.