Accident Narrative
The pilot reported that while flying under a low overcast at approximately 500 feet above the Yukon River, the #2 engine began to lose power. The airplane subsequently descended, and the fuselage and left propeller made contact with the water. Faced with these problems and decreasing visibility ahead, the pilot decided to execute a 180° turn. Approximately midway through the turn, the #2 engine lost all power. The airplane then struck trees and was destroyed by a post-impact fire.
Investigation Findings
Investigators found no reason for either engine to lose power before the water or tree contact. No mechanical malfunction or other cause was identified for the engine power loss.
Probable Cause
The official probable cause was determined to be the failure of the pilot to maintain adequate altitude after becoming distracted with an engine problem. Factors related to the accident included the loss of power in the #2 engine for an unknown reason and the low overcast condition.