NTSB Identification: CEN10LA004
14 CFR Part 91: General Aviation
Accident occurred Monday, October 05, 2009 in Eden Prairie, MN
Probable Cause Approval Date: 07/15/2010
Aircraft: Temco D-16A, registration: N124N
Injuries: 1 Serious.
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 airplane had just undergone its annual maintenance inspection. The pilot reported that he was in cruise flight in the twin-engine airplane about 600 feet above ground level when the left engine stopped producing power. He completed the shutdown checklist for the left engine and feathered the propeller. He applied full power to the right engine, but the airplane continued to lose altitude. He executed a forced landing to a large wooded area away from houses. Numerous witnesses reported that they heard and/or saw the airplane as it flew overhead at a low altitude. All reported hearing a loud engine noise without any sputtering. One witness reported that the left propeller was not turning. The inspection of the airplane revealed that the electric fuel pump found in the left engine nacelle exhibited blue staining on the top surface of the pump. The blue staining was consistent with a fuel leak. The test of the electric fuel pump revealed that the end cap gasket had failed, which allowed air to be drawn into the system by both the electric and engine-driven fuel pumps, thus starving the engine of fuel.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: A total loss of left engine power due to fuel starvation as a result of the failure of the engine's electric fuel pump end cap gasket, which allowed air to be drawn into the fuel system. Full narrative available
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