Accident Sequence
During the takeoff roll on runway 04R, at about 50 feet above ground level (AGL) and 4,000 feet down the runway, the right engine lost power. The pilot reported that his airspeed was 105 mph and that the right engine made a 'pop' sound before the power loss. After the right propeller was feathered, the left engine's power deteriorated. The aircraft entered a right bank, and the pilot maintained control until impact with water.
Investigation Findings
Examination of the right engine revealed that the right magneto (American Bosch SB9RU-3, serial number B88470) was not timed correctly. Disassembly of the magneto showed that all except 11 distributor gear teeth had been stripped off. At the time of the right engine power loss, approximately 5,000 feet of runway remained.
Probable Cause
The official probable cause identified three occurrences: 1. Loss of engine power (total) due to mechanical failure/malfunction of the ignition system (magneto). 2. Forced landing during the landing flare/touchdown phase. 3. Ditching during the landing flare/touchdown phase.
Findings included: improper in-flight planning/decision by the pilot-in-command, improper emergency procedure by the pilot-in-command, and failure to perform an aborted takeoff by the pilot-in-command.