Casualties unknown

1999-07-30: Mooney M20J (N91FH) — Mount Pleasant, TX

Mount Pleasant, TX, US

On July 30, 1999, a Mooney M20J (registration N91FH) was involved in an aviation accident near Mount Pleasant, TX. Investigators recorded the probable cause as: Disengagement of the fuel hose from the coupling at the fuel pump due to fatigue on a portion of the first thread. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot experienced fuel pressure loss and a strong fuel odor in cruise, leading to a forced landing short of the runway and a fence impact. Post-accident examination revealed a fuel hose disengaged from its coupling due to thread fatigue.

Incident Summary

During cruise flight at 10,500 feet mean sea level, the pilot detected a strong odor of fuel and observed the fuel pressure gauge needle drop to nearly zero. The pilot switched fuel tanks and activated the electric fuel pump, but these actions did not restore fuel pressure, and the fuel odor persisted.

Forced Landing

Given the loss of fuel pressure, the pilot initiated a forced landing to the nearest airport. However, the aircraft touched down in an open field approximately 1/4 mile short of the runway and subsequently impacted a fence.

Post-Accident Examination

Examination of the fuel system after the accident revealed that the fuel hose running between the fuel pump and the fuel injector servo had become disengaged from the coupling at the fuel pump. Further inspection of the coupling showed that a portion of the first thread had separated due to fatigue.

Probable cause

Disengagement of the fuel hose from the coupling at the fuel pump due to fatigue on a portion of the first thread.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X19281. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.