Accident Summary
Shortly after departing from San Juan-Isla Grande Airport, the aircraft experienced a right engine failure during the climb. The flight crew attempted to feather the propeller but was unable to do so. Control of the airplane was subsequently lost, leading to a rapid loss of speed and altitude. The aircraft crashed into the sea in the vicinity of the airport. Both occupants were rescued, but the aircraft was destroyed.
Probable Cause and Contributing Factors
The official investigation determined the probable cause of the accident to be an engine failure during the climb to cruise, resulting from inadequate maintenance. Contributing factors identified in the report include: the pilot-in-command attempting operation with known deficiencies in equipment; inadequate maintenance and inspection; failure of the ignition system (ignition harness, shielding); failure of the hydraulic pitch control mechanism; failure to follow approved procedures; improper emergency procedures; failure of the electrical system (generators/alternators and batteries); a loose propeller distributor valve; a cooperative right engine generator; and a weakened battery.