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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 Investigation type: Occurrence Investigation 
State: New South Wales Occurrence type: Wheels up landing 
Release date: 15 July 1991 Occurrence class: Operational 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
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
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