Incident Boeing 737-376 VH-TAK, 04 Apr 1999
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ASN Wikibase Occurrence # 190864
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Type:Silhouette image of generic B733 model; specific model in this crash may look slightly different    
Boeing 737-376
Registration: VH-TAK
MSN: 23485/1277
Fatalities:Fatalities: 0 / Occupants:
Other fatalities:0
Aircraft damage: Minor
Location:Melbourne Int Airport, VIC -   Australia
Phase: Approach
Nature:Passenger - Scheduled
Departure airport:Perth, WA
Destination airport:Melbourne, VIC
Investigating agency: ATSB
Confidence Rating: Information verified through data from accident investigation authorities
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.

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 recommendations:

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

Revision history:

10-Jun-2022 08:53 Ron Averes Updated [Location]
24-Jan-2023 20:27 harro Updated [Phase, Narrative]

Corrections or additions? ... Edit this accident description

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