NTSB Identification: MIA02LA121.
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Accident occurred Thursday, July 04, 2002 in Lake Placid, FL
Probable Cause Approval Date: 10/23/2002
Aircraft: Kenneth Parmerter Loehle 5151 Mustang, registration: None
Injuries: 1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot stated that he was conducting a test flight and had just made a low pass over the runway, and was turning to base when he noticed a reduction in engine rpms. He said he "steepened" the turn in an attempt to make it back to the runway, and stalled the airplane. He said the airplane fell like a rock, impacting the ground with the right wing down, at a near 45-degree angle with the horizontal, shattering the wooden right wing and damaging the fuselage. An FAA licensed airframe and powerplant mechanic with an inspection authorization rating, examined the accident airplane and stated that the engine had been improperly installed and had not been properly vented back to the expansion tank. He said he found hot spots on the cylinder head, consistent with there having been trapped air in the cylinder head, which resulted in excessive internal temperatures in the engine causing it to cease operating.

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

The pilot's failure to maintain airspeed and his inflight loss of control while maneuvering to land following an engine failure. Contributing to the accident was the builder/owner's improper engine installation that resulted in engine overheating and ceasing to operate.

Full narrative available

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