Casualties unknown

Fuel System Irregularities Found After Engine Failure on Takeoff (N1930A)

Kasilof, AK, US

On April 28, 1996, a Piper PA-18 (registration N1930A) operated by Paul G. Isaak was involved in an aviation accident near Kasilof, AK. Investigators recorded the probable cause as: fuel starvation due to a kinked fuel supply line from the left main tank, and the pilot's improper rebuild/remanufacture of the airplane. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

A private pilot experienced an engine failure during initial climb after departing a grass airstrip. Postaccident examination revealed a kinked fuel line and incorrect fuel line and vent sizes.

Accident Details

A certificated private pilot was departing a private 2,000-foot-long grass airstrip. Before departure, the pilot selected the left fuel tank. During the initial climb, the engine suddenly quit about 100 feet in the air. The pilot selected an emergency landing area, and the airplane collided with several trees during the landing.

The pilot indicated that the remanufactured engine he installed had accrued 25 hours. The airplane had been rebuilt by the pilot, who was not a certificated airframe or powerplant mechanic. The pilot did not possess any airworthiness documentation for the airplane.

Postaccident Findings

A postaccident examination of the airplane revealed a kink in the fuel line from the left fuel tank. The fuel line from the fuel strainer to the carburetor was 1/4 inch in diameter, whereas the standard size is 3/8 inch. Additionally, the fuel caps on each tank were required to have a 3/8 inch vent line, but the installed caps had a 1/4 inch vent.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001208X05507. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.