NTSB Identification: ERA12LA532
14 CFR Part 91: General Aviation
Accident occurred Sunday, August 26, 2012 in East Hampton, NY
Probable Cause Approval Date: 08/13/2013
Aircraft: MOONEY M20C, registration: N557M
Injuries: 2 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 pilot reported that after takeoff, he retracted the landing gear and flaps and that the engine rpm decreased from 2,750 rpm to 2,400 rpm. He verified that the carburetor heat was off and that the throttle, propeller, and mixture controls were full forward. He declared an emergency with the control tower controller and turned left in an attempt to land on a closed runway. During the turn, "the engine became quiet," and the airplane collided with trees.

Postaccident examination of the airplane and engine showed no evidence of precrash mechanical failure or malfunction. Review of the FAA carburetor icing probability chart showed that conditions at the time of the accident were conducive to light carburetor icing at cruise and glide power; however, the airplane was operating at a higher power setting. The reason for the loss of engine power could not be determined.

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

A loss of engine power for reasons that could not be determined because postaccident examination of the engine did not reveal any failures or malfunctions that would have precluded normal operation.

Full narrative available

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