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During the takeoff roll, witness evidence suggested that the right mainwheel tyre had blown. The pilot requested a low pass for an inspection of the gear and it was determined that the complete right mainwheel was missing. After reducing fuel weight to a minimum by burnoff, the pilot carried out a wheels-up landing on the runway which had been foamed in advance. Subsequent on-site inspection by the Civil Aviation Authority airworthiness staff determined that four adjacent mainwheel tie bolts had failed due to under-torquing. The resulting play in the wheel halves then caused the mainwheel bearing to fail followed by the stripping of the remaining tie bolt nuts and the complete separation of the outer half of the mainwheel and the tyre. The last periodic inspection of the aircraft was completed just prior to the accident flight.

Download Final Report
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General details
Date: 12 July 1989 Investigation status: Completed 
Time: 850 Investigation type: Occurrence Investigation 
Location:Darwin Occurrence type:Wheels up landing 
State: Northern Territory Occurrence class: Operational 
Release date: 03 November 1989 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Cessna Aircraft Company 
Aircraft model: 421 
Aircraft registration: VH-ANH 
Serial number: 421C0006 
Type of operation: Charter 
Damage to aircraft: Substantial 
Departure point:Darwin NT
Departure time:0724
Destination:Gove NT
 
 
 
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