Accident Overview
A helicopter involved in firefighting operations, specifically aerial observation, experienced an engine power loss during flight. The pilot reported that the helicopter was in a cruise configuration at an altitude of 200 to 400 feet above ground level (AGL) when the engine lost power. The pilot initiated an autorotation, and the helicopter descended into heavily wooded terrain.
Post-Accident Events
Two days after the accident, before the helicopter could be recovered, the ongoing forest fire burned over the helicopter. The fire destroyed the aircraft, engine, and associated system components.
Examination Findings
An examination and teardown of the engine and associated components was conducted. The investigation did not reveal any evidence of a pre-impact part failure or signs of abnormal wear.
Investigation Remarks
No further details were provided regarding the helicopter's type, registration, operator, or number of occupants. The pilot's condition was not specified. The cause of the engine power loss was not determined from the available evidence.