Accident Overview
On July 31, 2009, at approximately 1058 central daylight time, a Cessna 177RG (registration N2108Q) experienced a loss of engine power while in cruise flight en route to Wittman Regional Airport in Oshkosh, Wisconsin. The aircraft was operating under 14 CFR Part 91 on an activated visual flight rules flight plan. The flight had originated at 0930 from Flying Cloud Airport near Minneapolis, Minnesota. The three occupants included the private pilot and two passengers. The pilot and one passenger were uninjured, while the other passenger sustained minor injuries.
Pilot Report
According to the pilot, he noticed the engine oil temperature indicator reading too high. He responded by opening the cowl flaps, reducing engine power, and enriching the mixture. The oil temperature decreased but remained above what the pilot considered safe. Subsequently, the engine failed and oil covered most of the windshield. The pilot declared an emergency, began gliding, and lowered the landing gear on approach. He reported that on final approach, he realized he had circled too wide to reach the runway and maintained best glide until the aircraft struck a garage.
Inspection Findings
Federal Aviation Administration inspectors examined the wreckage. Their inspection revealed that the number two cylinder piston connecting rod had failed and fractured the top of the engine case. The connecting rod fracture ends exhibited damage that occurred after separation.
Aircraft Equipment
The pilot noted that the aircraft was equipped with a digital engine monitor and a warning light. He stated that the warning light provided him assurance of additional time to decide on a course of action.