Incident Overview
During a multi-engine training flight, the aircrew encountered a malfunction when the nose landing gear failed to extend while on the downwind leg for landing. Despite attempts to extend the gear, including a bounced landing, the nose gear remained retracted.
Actions Taken
The multi-engine instructor pilot (IP), occupying the right seat, established the aircraft on a straight-in final approach with half flaps and zero thrust (10 in Hg) on both engines. While still airborne, the IP directed the student, a single-engine IP, to feather both propellers and shut down both engines. This resulted in an immediate increase in the rate of descent.
Touchdown and Damage
The aircraft touched down on an embankment approximately 45 feet short of the runway. After the initial touchdown, the aircraft bounced. Following a second touchdown, the nose contacted the runway about 55 feet beyond the touchdown point, sustaining damage.
Investigation Findings
Post-accident investigation revealed that a rocking nut, which retained the nosewheel, was missing. The aircraft had undergone a 100-hour inspection approximately 8 hours prior to the accident.