Incident Overview
An aircraft experienced a loss of fuel pressure and engine power approximately 30 minutes after takeoff while cruising at 4,500 feet mean sea level. The pilot subsequently ditched the aircraft in the ocean. The aircraft was not recovered.
Fuel Details
The pilot reported that the aircraft had departed with 30 plus gallons of automotive gasoline for a planned 130-mile trip. According to the engine manufacturer, the engine was designed for a minimum of 91/96 aviation grade fuel.
Regulatory Context
The Federal Aviation Administration (FAA) has issued Supplemental Type Certificates (STCs) that permit the use of automobile gasoline in this engine type. These STCs include requirements to verify the specifications of the automotive gasoline being used and provide information about an increased tendency for carburetor icing and vapor generation when using such fuel.
Aircraft Records
A review of the aircraft records obtained from the FAA Oklahoma City office found no record of approval for the use of automobile gasoline via FAA Form 337, which is the standard form for recording major repairs and alterations.