Aviation Accident Summary DEN85LA059

RAWLINS, WY, USA

Aircraft #1

N3575Z

PIPER PA-18-150

Analysis

THE ACFT LOST ENG PWR AND WAS SUBSTANTIALLY DAMAGED DURING AN OFF ARPT ENERGENCY LANDING. THE PURPOSE OF THE FLT WAS TO LOOK FOR COYOTES. THE POST ACCIDENT ENG EXAM REVEALED THAT 9 CONSECUTIVE TEETH ON THE LEFT MAGNETO DRIVE GEAR WERE GROUND OFF. THIS ALLOWED THE SPARK PLUGS ENERGIZED BY THE LEFT MAGNETO TO FIRE OR SPARK OUT OF PROPER SEQUENCE.

 

Source: NTSB Aviation Accident Database

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