Incident Overview
During taxi, the right main landing gear of the aircraft collapsed. The pilot was operating the aircraft on the ground when the gear failure occurred.
Investigation Findings
The subsequent investigation determined that the collapse resulted from the seizure of the upper downlock top bushing within the landing gear mechanism. This seizure allowed the main landing gear to be rigged improperly, preventing it from being fully down and locked even though the gear down light was illuminated.
Maintenance Context
A mechanic involved in the investigation stated that the expanded inspection procedures explicitly require that the landing gear bushing be free. The seized bushing was found to have compromised the gear's ability to lock in the extended position.
Outcome
No further details regarding the aircraft, location, or personnel were provided in the source material. The aircraft sustained damage to the right main landing gear structure as a result of the collapse.