Aircraft: Cessna 150. Injuries: None. Location: Mansfield, Mass. Aircraft damage: Substantial.
What reportedly happened: The accident happened during a training flight. According to the flight instructor, during climb out when the airplane reached 250 feet AGL, the airplane stopped climbing and began to descend.
The flight instructor assumed control of the airplane and verified the position of the engine controls, but could not get the airplane to climb. The airplane came down in trees off the departure end of the runway.
After the accident, the airplane was removed from the trees by local authorities and placed inverted on the ground. As a result, all residual fuel drained from the airplane, and no fuel was available for testing.
The engine was removed and placed in a test cell where it started immediately, accelerated smoothly, and ran continuously at rated power.
Atmospheric conditions at the time of the accident were conducive to serious icing at any power setting, and the flight instructor stated that he ensured that the carburetor heat control was in its cold position during the takeoff.
Investigators determined that based on the conditions, it is likely that the loss of engine power was related to the accumulation of carburetor ice during takeoff.
Probable cause: The pilots’ failure to apply carburetor heat during takeoff, which resulted in a partial loss of engine power due to the formation of carburetor ice.
NTSB Identification: ERA13LA034
This October 2012 accident report is are provided by the National Transportation Safety Board. Published as an educational tool, it is intended to help pilots learn from the misfortunes of others.