Flight Sequence
A flight experienced an alternator failure early in the journey. The pilot decided to continue to the intended destination. Approximately 20 minutes before arrival, the aircraft lost all electrical power.
Approach and Collision
The flight was conducting a night visual approach. A passenger, who was also pilot-rated, held a flashlight on the instrument panel to provide lighting. During the approach, the pilot allowed the aircraft to descend too low, resulting in a collision with treetops.
Go-Around Attempt
After the initial collision with the treetops, the pilot initiated a go-around. The pilot-rated passenger stated that the runway was already made following the collision. However, the aircraft was unable to climb during the go-around. It subsequently collided with trees and came to rest.
Alternator Examination
Examination of the alternator revealed that the failure was caused by a brush slip ring that had been damaged during overhaul. This damage led to premature wearing of the brushes. The alternator had accumulated only 57 hours of operation since the overhaul.