NTSB Identification: FTW96LA384.
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Accident occurred Wednesday, September 11, 1996 in COLORADO SPRNGS, CO
Probable Cause Approval Date: 05/23/1997
Aircraft: Cessna 177RG, registration: N2797V
Injuries: 1 Uninjured.

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

A factory overhauled engine had been installed in the airplane and the pilot took off on a maintenance test flight. Eleven minutes later, the pilot reported a 'runaway prop.' The engine seized shortly thereafter. The pilot attempted to return to the airport, but was too far away. He selected a soccer field on which to make a forced landing, but misjudged his airspeed and altitude and overshot. The pilot landed on a street and collided with two vehicles. Removal of the propeller governor disclosed maintenance personnel had failed to install one of two required gaskets and a governor pad as required by Textron Lycoming Service Instruction No. 1438, dated July 9, 1987. This allowed engine oil to be depleted.

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

The improper installation of the propeller governor by company maintenance personnel, resulting in the total loss of oil and engine seizure. Factors were the pilot's misjudgment of altitude and airspeed, causing him to make a forced landing on unsuitable terrain and collide with a tree and motor vehicles.

Full narrative available

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