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Piper PA-32RT-300 accident at Vallejo, CA, 26 Apr 1992 (N31557)

Vallejo, CA, US

On April 26, 1992, a Piper PA-32RT-300 (registration N31557) operated by Siebert, Edward G. was involved in an aviation accident near Vallejo, CA. Investigators recorded the probable cause as: WAS THE FAILURE OF THE FUEL SERVO DIAPHRAGM STEM WHICH RESULTED IN A FUEL INTERRUPTION TO THE ENGINE. HIGH OBSTRUCTIONS AND UTILITY POLE IN THE FORCED LANDING AREA WERE FACTORS CONTRIBUTING TO THE ACCIDENT. 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

Probable cause

WAS THE FAILURE OF THE FUEL SERVO DIAPHRAGM STEM WHICH RESULTED IN A FUEL INTERRUPTION TO THE ENGINE. HIGH OBSTRUCTIONS AND UTILITY POLE IN THE FORCED LANDING AREA WERE FACTORS CONTRIBUTING TO THE ACCIDENT.

— NTSB Determination

Accident narrative

THE PILOTS WERE CONDUCTING AN OBSERVATION FLIGHT OVER THE NORTHEAST END OF THE SAN FRANCISCO BAY WHEN THE AIRPLANE'S ENGINE FAILED. THE PILOTS WERE UNABLE TO RESTART THE ENGINE AND TURNED TOWARDS A ROADWAY NORTH OF THE BAY TO LAND. THE AIRPLANE LANDED SHORT OF THE SELECTED LANDING AREA AND STRUCK A FENCE AND A UTILITY POLE. AN EXAMINATION OF THE FUEL INJECTOR SERVO AFTER THE ACCIDENT DISCLOSED THAT THE FUEL CONTROL DIAPHRAGM STEM FAILED INTERRUPTING THE FUEL SUPPLY TO THE ENGINE.

Frequently asked questions

What happened in the 26 Apr 1992 Piper PA-32RT-300 accident near Vallejo, CA?

THE PILOTS WERE CONDUCTING AN OBSERVATION FLIGHT OVER THE NORTHEAST END OF THE SAN FRANCISCO BAY WHEN THE AIRPLANE'S ENGINE FAILED. THE PILOTS WERE UNABLE TO RESTART THE ENGINE AND TURNED TOWARDS A ROADWAY NORTH OF THE BAY TO LAND. THE AIRPLANE LANDED SHORT OF THE SELECTED LANDING AREA AND STRUCK A FENCE AND A…

What aircraft was involved and where did it happen?

The accident on 26 Apr 1992 involved a Piper PA-32RT-300, registration N31557, operated by Siebert, Edward G., at Vallejo, CA.

What was the probable cause of the accident?

WAS THE FAILURE OF THE FUEL SERVO DIAPHRAGM STEM WHICH RESULTED IN A FUEL INTERRUPTION TO THE ENGINE. HIGH OBSTRUCTIONS AND UTILITY POLE IN THE FORCED LANDING AREA WERE FACTORS CONTRIBUTING TO THE ACCIDENT.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X14463. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.