Aviation safety investigations & reports

Cessna 172 N, VH-UJS, Agnes Waters (80 km NW Bundaberg) QLD, 2 January 1986

Investigation number:
Status: Completed
Investigation completed


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The aircraft was being operated on a VFR flight and was cruising at 1500 feet above ground level. The engine suddenly began to run roughly and the rpm dropped to about half the normal setting. Emergency trouble checks failed to alleviate the problem and the pilot transmitted a Mayday call as he tracked towards a nearby strip for a precautionary landing. The approach to this strip was too high and power was applied in an attempt to go around. However, severe engine vibration occurred and the pilot was committed to a forced landing in densely forested, hilly terrain. The power loss and vibration was caused by partial separation of the exhaust valve head on one of the cylinders.

Download Final Report
[Download  PDF: 22KB]
General details
Date: 02 January 1986   Investigation status: Completed  
Time: 1020    
Location: Agnes Waters (80 km NW Bundaberg)    
State: Queensland    
Release date: 25 February 1986   Occurrence category: Accident  
Report status: Final   Highest injury level: Minor  

Aircraft details

Aircraft details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 172  
Aircraft registration VH-UJS  
Type of operation Private  
Damage to aircraft Substantial  
Departure point Archerfield QLD  
Departure time 1020  
Destination Great Keppel Island QLD