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The aircraft had been parked in a hangar and not flown for six months until the day before the accident. After landing on that occasion the pilot noticed that the airspeed indication was slow to return to read zero. The next day the pilot believed the airspeed took longer than usual to reach the normal cruise indication. When on final, with an indicated airspeed of 80 kt the stall warning light illuminated, the aircraft stalled and struck the ground. Prior to the second flight the pilot had attempted to clear the pitot/static system by blowing into the pitot tube. Inspection of the static system found evidence of a blockage by an insect nest. The blockage was in such a position that it would not have been visible during a preflight inspection.

Download Final Report
[ Download PDF: 22KB]
 
 
 
 
General details
Date: 21 January 1984 Investigation status: Completed 
Time: 1130 Investigation type: Occurrence Investigation 
Location:Mundabullangana Occurrence type:Hard landing 
State: Western Australia Occurrence class: Operational 
Release date: 25 September 1984 Occurrence category: Accident 
Report status: Final Highest injury level: None 
 
Aircraft details
Aircraft manufacturer: Piper Aircraft Corp 
Aircraft model: PA-28 
Aircraft registration: VH-IMT 
Type of operation: Aerial Work 
Damage to aircraft: Substantial 
Departure point:Mundabullangana WA
Departure time:1000
Destination:Mundabullangana WA
 
 
 
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Last update 13 May 2014