FREEBURG, IL, USA
N8479F
PIPER PA-28-151
THE CFI SAID THAT WHILE PRACTICING MINIMUM CONTROLLABLE FLIGHT AND STALLS DURING A DUAL INSTRUCTIONAL FLIGHT, THE PROPELLER CEASED TO TURN. THE MIXTURE CONTROL WAS PUSHED TO FULL RICH, BUT A RESTART WAS NOT SUCCESSFUL. AN EMERGENCY LANDING WAS ATTEMPTED ON A RURAL ROAD WHICH RESULTED IN A COLLISION WITH A ROAD SIGN. POST ACCIDENT INVESTIGATION REVEALED NO MECHANICAL ENGINE MALFUNCTIONS OR FUEL SUPPLY SHORTAGE. A LOOSE FRICTION CONTROL LEVER WAS FOUND WHICH FAILED TO LOCK THE QUADRANT LEVERS IN PLACE.
IMPROPER USE OF THE MIXTURE CONTROL BY THE PIC/CFI. A FACTOR RELATED TO THE ACCIDENT WAS INADEQUATE FRICTION ON THE MIXTURE CONTROL LEVER.
Source: NTSB Aviation Accident Database
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