Aviation safety investigations & reports

Piper PA31, VH-MWP, Gunnedah NSW, 14 April 1990

Investigation number:
Status: Completed
Investigation completed


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The pilot reported the flight was uneventful until the landing gear failed to extend normally prior to landing at Quirindi. Normal and emergency procedures were unsuccessful. The aircraft then diverted to Gunnedah where ground observers reported the landing gear appeared to be extended, however, the right main gear collapsed during the landing roll. Investigation revealed an internal failure of the landing gear air/ground safety switch which rendered the gear door solenoid valve inoperative. The failure had apparently occurred during the initial landing gear extension cycle prior to the locking sequence of the right maingear. All subsequent hydraulic action was then directed to the selector handle lock valve, preventing completion of the landing gear extension cycle

Download Final Report
[Download  PDF: 22KB]
General details
Date: 14 April 1990   Investigation status: Completed  
Time: 1232    
Location   (show map): Gunnedah    
State: New South Wales   Occurrence type: Wheels up landing  
Release date: 15 July 1991   Occurrence category: Accident  
Report status: Final   Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Piper Aircraft Corp  
Aircraft model PA-31  
Aircraft registration VH-MWP  
Serial number 31-8352005  
Type of operation Air Transport Low Capacity  
Damage to aircraft Substantial  
Departure point Sydney NSW  
Departure time 1000  
Destination Quirindi NSW