Pipistrel ALPHA TRAINER N10PU accident near Pompano Beach, Florida

Probable cause

The pilot’s miscalculation of the fuel quantity requirements, which resulted in fuel exhaustion.

NTSB analysis

According to the pilot, during the preflight inspection, he determined that the airplane had 45 percent of its fuel capacity (5.7 of 12.7 usable gallons). He determined the fuel amount by viewing the indicators on the cockpit panel and by "dipping" the tank and noting that the fuel level was just below the halfway mark on the dip stick. He found no water or grit in the fuel. The pilot reported that the flight was intended to be 1 hour long and that, per the airplane's performance criteria, he calculated that the engine would consume 3.6 gallons of fuel during the flight. The pilot took off on the local flight, and, when the airplane was inbound toward his home airport, the engine "abruptly stopped." He then diverted toward a closer airport and attempted to restart the engine without success. While approaching the airport, he made shallow turns to align the airplane with a runway, but the airplane's left wing impacted a tree, and the airplane subsequently impacted the airport perimeter fence. The cockpit GPS indicated that the flight was 0.9 hour long. No fuel was found in the fuel tanks or lines, and no evidence of fuel leakage was found at the accident site.

Text from the NTSB. Open the NTSB docket for ERA14LA355 for the full record.