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Narrative:During approach, the crew of the Boeing 737 selected "gear down". A loud "bang" was heard and the "gear safe" green light for the right main landing gear illuminated immediately. The left main and nose landing gear lights illuminated in a time consistent with a normal extension sequence. As the cockpit indications showed that the landing gear was locked down, the approach was continued and a normal landing was completed.
|Fatalities:||Fatalities: 0 / Occupants: |
|Aircraft damage:|| Minor|
|Location:||Melbourne Int Airport, VIC -
|Nature:||Passenger - Scheduled|
|Departure airport:||Perth, WA|
|Destination airport:||Melbourne, VIC|
|Investigating agency: ||ATSB|
|Confidence Rating:|| Information verified through data from accident investigation authorities|
Inspection of the aircraft revealed that the right main landing gear (MLG) trunnion pin attach lugs had failed. As a result, the right main gear hydraulic actuator disconnected from the MLG assembly, resulting in free-fall of the right MLG during extension to the "down and locked" position. The trunnion pin failure
resulted in little damage to the actuator and surrounding structure. No damage to control cables or hydraulic lines occurred.
Safety recommendation IR19990046 issued 27 May 1999 by ATSB to Boeing
Safety recommendation IR19990047 issued 27 May 1999 by ATSB to Boeing
Safety recommendation IR19990048 issued 27 May 1999 by ATSB to FAA
Safety recommendation IR19990049 issued 27 May 1999 by ATSB to CASA
Safety recommendation IR19990050 issued 27 May 1999 by ATSB
||Updated [Phase, Narrative]|