Accident Summary
While on a 2-mile final approach to a runway, the airplane's engine lost power. The pilot was unable to restore full power and could not maintain altitude. The airplane subsequently struck trees approximately 50 feet above the ground.
Preflight Inspection
During the preflight inspection, the right wing fuel tank drain was found frozen and had to be heated. The first two fuel samples from that tank contained a small amount of water, but the third and fourth samples were clear. The left tank drain was not frozen, and it also contained a small amount of water. No water was detected in the filter drain.
Wreckage Examination
Examination of the wreckage, conducted while the outside ambient temperature (OAT) was below freezing, revealed a small amount of water and contaminants in the carburetor bowl and the fuel drain. When the fuel caps were removed, the sounds of the tanks expanding from the inrushing air were heard. After the wings were removed and placed in a heated hangar, approximately one cup of dirty water was found in the fuel tanks.
Engine Test Run
The engine was subsequently test run and operated satisfactorily.
Contributing Factors
At the time of the accident, the OAT had been below freezing for the preceding 24 hours.