Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
General Maintenance Action
Aircraft
Flight went as planned. It was a ferry flight [that] was to be conducted with the gear to remain down and locked for the duration of the flight. There were no abnormal indications in the cockpit throughout the flight. All three landing gear position indicators indicated down and locked for the entire duration of the flight. After landing the airplane was taxied to the hangar for parking where the engines were shut down and airplane was secured per the aircraft checklists. The landing gear also indicated down and locked during the taxi from after landing to parking. The airplane was then hooked up to a tug where the aircraft began to be pushed back into the hangar with a towbar. The right main gear then collapsed as it was being pushed back. I have no knowledge of why this may have happened. A thorough preflight was conducted prior to flight using the aircraft checklist which included an inspection of the right main landing gear and gear well. No abnormalities were noted or detected. Throughout the entire duration of the flight and also after landing at our destination; the landing gear position indicators indicated all three landing gear were down and locked.
[Report narrative contained no additional information.]
SA-227 flight crew reported that following an uneventful ferry flight the right main landing gear collapsed while the aircraft was being backed into the hangar by a tug.