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After selecting gear down, a safe indication could not be obtained for the left main gear. The pilot diverted to a more suitable aerodrome, where further attempts to lower that gear also failed. The gear was retracted and a wheels-up landing carried out. The pilot subsequently advised that a similar left gear unsafe indication had occurred 3 landings prior to this particular occurrence, but on that occasion after recycling the gear a normal extension was obtained. The left gear had not been rigged or lubricated in accordance with maintenance instructions, and the left gear uplock roller had seized. A check that the rollers are free to rotate is part of the normal pre-flight inspection. Indications were that neither of the maingear rollers had rotated for some time. There was some doubt that the pilot had been advised of the gear roller check requirement when he was undergoing endorsement training on the aircraft.

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General details
Date: 31 August 1987 Investigation status: Completed 
Time: 942  
Location:Port Hedland Investigation type: Occurrence Investigation 
State: Western Australia Occurrence type: Wheels up landing 
Release date: 20 January 1988 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Beech Aircraft Corp 
Aircraft model: 58 
Aircraft registration: VH-WLC 
Serial number: TH-977 
Type of operation: Business 
Damage to aircraft: Substantial 
Departure point:Yulara NT
Departure time:0942
Destination:Telfer WA
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