Incident Overview
While cruising at 10,000 feet MSL in instrument meteorological conditions (IMC), the pilot reported a loss of engine power. During the subsequent descent to 2,000 feet, the engine restarted and failed several times but eventually maintained idle power for the remainder of the descent.
ATC and Approach
Portland Approach Control provided vectors to the pilot during the descent. The aircraft broke out of the clouds into light rain and snow at 300 feet AGL, approximately 1,000 feet from the approach end of Runway 06.
Landing and Damage
During landing, the pilot intentionally skidded the aircraft, collapsing the landing gear, to prevent the aircraft from overrunning the runway.
Pilot Statement
The pilot stated that freezing water in the alternate air system prevented the alternate air gate from operating, which prevented sufficient air from reaching the engine.