Incident Overview
A pilot experienced smoke and heat in the cockpit after moving the landing gear handle to the up position. The gear appeared to be stuck in an intransit position. The smoke, described as smelling like burning electrical insulation, became heavy and heat was felt on the cockpit floor. The pilot returned to the airport, and the landing gear collapsed during landing.
Examination Findings
Post-incident examination revealed that the landing gear motor and associated wiring were burned. The cockpit flooring showed signs of partial melting. The right landing gear actuator was found to have been improperly overhauled, resulting in three gear teeth breaking and jamming the actuator.
Service Bulletin Non-Compliance
Beech Mandatory Service Bulletin No. 2035, Revision II, which required replacing the 200-amp gear motor circuit breaker with a 60-amp breaker to prevent gear motor damage, had not been accomplished on this airplane.