Incident Overview
A pilot reported that approximately 40 minutes into an overwater flight between islands, he requested a descent to 3,400 feet, which was approved by air traffic control. The pilot then reduced the engine power to 2,000 rpm; however, the engine rpm dropped to 1,500. Subsequent actions by the pilot to restore engine power were unsuccessful.
Water Landing and Rescue
Following the loss of engine power, the pilot performed a successful water landing. The occupants exited the airplane and were rescued by the United States Coast Guard about 30 minutes later. The airplane subsequently sank and was not recovered.
Aftermath
No further details regarding the cause of the engine power loss or the condition of the occupants were provided in the report. The aircraft was not recovered, precluding a post-accident examination.