Sa-227 flight crew reported that following an uneventful ferry flight the right main landing gear co...

Narrative:

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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1308662
Time
Date	201511
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	SA-227 AC Metro III
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Main Gear
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

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.