The no. 1 engine failed 12 miles east of San Juan. While securing the engine, a loss of power on the no. 2 engine occurred. The pilot was forced to ditch the DC-3 1000 feet offshore. PROBABLE CAUSE: pilot in command – mismanagement of fuel miscellaneous acts,conditions – inattentive to fuel supply miscellaneous acts,conditions – fuel starvation pilot in command – failed to follow approved procedures,directives,etc. miscellaneous acts,conditions – improper emergency procedures FACTORS: pilot in command – inadequate preflight preparation and/or planning personnel – operational supervisory personnel: inadequate supervision of flight crew personnel – maintenance,servicing,inspection: inadequate inspection of aircraft (maintenance personnel) miscellaneous acts,conditions – checklist-failed to use miscellaneous acts,conditions – aircraft came to rest in water complete power loss – complete engine failure/flameout-2 engines