NTSB Identification: CHI94DCA02.
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Accident occurred Monday, July 18, 1994 in HARVIELL, MO
Probable Cause Approval Date: 02/24/1995
Aircraft: Schweizer G-164B, registration: N48484
Injuries: 1 Minor.

THE PILOT REPORTED THAT DURING THE TAKEOFF ROLL ON THE 35TH AND LAST FLIGHT OF THE DAY, RPM ON THE TURBOPROP ENGINE WAS OBSERVED IN THE LOW GOVERNING RANGE, INCAPABLE OF TAKEOFF THRUST. HE SELECTED REVERSE THRUST WITH NO RESULT, AND INTENTIONALLY GROUND LOOPED THE AIRPLANE TO AVOID IMPACT WITH OBSTRUCTIONS. THE PILOT REPORTED THE OIL SUPPLY LINE TO THE PROPELLER GOVERNOR HAD BECOME DISCONNECTED. DISASSEMBLY AND TESTING OF THE ENGINE, FUEL CONTROL AND GOVERNOR FAILED TO REVEAL ANY OTHER DISCREPANCIES.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

the separation of the oil supply line to the propeller governor, which resulted in the propeller inadvertently going into feather. Factors were the pilots intentional ground loop of the airplane to avoid impacting obstructions at the end of the runway.

Full narrative available

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