Accident Overview
The pilot reported that start, taxi, and takeoff were normal until after raising the gear handle, when the aircraft was climbing through approximately 150 to 200 feet above ground level. At that point, the left engine rpm began to decay. With insufficient runway remaining to abort, the pilot elected to feather the left engine and continue the takeoff. However, the left propeller stopped rotating before it feathered.
Pilot Actions
Due to the additional drag from the left propeller, the aircraft would not climb or maintain level flight. The pilot managed to fly the aircraft over buildings and other obstacles, some up to 75 feet tall, near the airport boundary. Immediately beyond these obstacles, the aircraft struck trees and crashed in a wooded area. A small post-impact fire occurred near the accessory section of the right engine.
Examination Findings
An examination and teardown of the left engine revealed that an impeller shaft bearing, Pratt & Whitney part number 288943, had failed. This failure allowed the impeller to rub against the diffuser. No other preimpact failures were found. The pilot, sole on board, was slightly injured.
Probable Cause
Official findings identified the following: Occurrence #1: loss of engine power (total) due to mechanical failure/malfunction of the engine assembly blower/impeller/integral supercharger. Occurrence #2: forced landing where propeller feathering was not possible by the pilot. Occurrence #3: in-flight collision with objects (trees) due to none suitable terrain and high obstructions. Occurrence #4: in-flight collision with terrain/water during an uncontrolled descent.