Amateur-built SONERAI II L N333BM accident near Jean, Nevada

Probable cause

A reported loss of engine power for undetermined reasons.

NTSB analysis

The pilot stated that he added 3.8 gallons of fuel before departure but did not know the total amount of fuel on board. While en route, the pilot diverted to another airport due to strong headwinds. After passing over the airport and assessing the landing conditions, the engine sustained a loss of power. The pilot was unable to maintain altitude and the airplane collided with the desert terrain adjacent to the runway.

A postaccident examination of the engine and fuel system revealed no evidence of a pre-impact mechanical malfunction or failure. First responders stated that a visual examination of the fuel quantity indicator showed the fuel tank was empty. This was confirmed by opening the fuel cap, visually examining the inside of the tank, and then inserting a dipstick. Although the 10-gallon fuel tank was not breached during the accident, the gascolator drain sustained damage. Due to the damage of the gascolator, it is unknown if fuel leaked out of the system following the accident. Therefore, it could not be definitively determined if the loss of power was a result of fuel exhaustion, but no other anomalies could be found.

Text from the NTSB. Open the NTSB docket for WPR22LA142 for the full record.