# Accident 19920702023659A: Cessna 421B, Hayward, CA, July 2, 1992

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 2, 1992, 17:45 local time
- Place: Hayward, CA
- Airport: Hayward Air Terminal
- Damage: Substantial damage
- Phase of flight: Starting Engines
- Operating rules: General operating rules (Part 91)
- Operator: KIMA
- Location: 37.6698° N, 122.0793° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=37.6698&lon=-122.0793&mi=10
- Aircraft: N11BU (not matched to a registry record)
- Reported make and model: CESSNA 421B
- Reported engine: CONT GTSIO520H
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 7,900 total, 900 in this make and model, 80 in the last 90 days
- NTSB investigation: [NTSB LAX92LA276](https://openairdocs.org/ntsb/LAX92LA276) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19920702023659A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

EXPLOSION IN RIGHT WING AUXILIARY TANK. LEAK IN LINE TO AUX PUMP. PILOT BELIEVES HE OVERPRIMED ENGINE ON START UP.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX92LA276](https://openairdocs.org/ntsb/LAX92LA276), Jul 3, 1992: Cessna 421B (N11BU), Hayward, CA, substantial damage. Probable cause: THE EXPLOSION OF FUEL VAPORS IN THE RIGHT WING DUE TO THE PILOT'S OVERPRIMING OF THE RIGHT ENGINE DURING A START ATTEMPT AND AN UNCORRECTED PREEXISTING FUEL SYSTEM LEAK. A FACTOR IN THE ACCIDENT WAS…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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