Flight Events
While en route, the pilot noted a partial loss of electrical power and that the fuel gage was de-energized. He continued the flight. During an ILS runway 29 approach at the destination, a total loss of electrical power occurred.
Emergency Descent
The pilot decided to descend below the clouds into visual meteorological conditions (VMC), which he encountered at about 400 feet above mean sea level over Casco Bay. He stated that he was reading a chart to locate the destination airport when the engine lost power.
Ditching and Rescue
The pilot ditched the airplane in the bay, escaped, and was rescued by the Coast Guard. The passenger did not escape from the airplane.
Post-Accident Examination
During an examination of the airplane, about 15 gallons of fuel was drained from the left tank and about one half gallon was drained from the right tank. The fuel selector was found positioned to the right tank. The reason for the loss of electrical power was not verified.