ONIDA, SD, USA
N3856E
PIPER PA-36
THE PLT REPORTED A PARTIAL LOSS OF PWR OCCURRED MOMENTARILY BEFORE LIFTOFF. THE TAKEOFF WAS CONTINUED AND ONCE AIRBORNE THE PWR LOSS REOCCURRED. THE LOAD WAS DUMPED, HOWEVER, THE ACFT IMPACTED TREES APRX 1 MILE FROM THE ARPT AS SUFFICIENT ALT COULD NOT BE MAINTAINED. POST ACCIDENT INSPECTION REVEALED THE #2 AND #8 CYLINDER INTAKE VALVES WERE TULIPED AND WOULD NOT CLOSE. THE #2, #6 AND #8 OUTLET TOWER BLOCKS ON THE MAGNETO WERE CROSSFIRING WHICH RESULTED IN PRE-IGNITION TO THOSE CYLINDERS.
Source: NTSB Aviation Accident Database
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