# NTSB Accident LAX92LA276
> **CESSNA 421B** · 1992-07-03 · HAYWARD, CA, USA · NONE
## Event
- **NTSB number:** LAX92LA276
- **Event ID:** 20001211X15178
- **Type:** Accident
- **Date:** 1992-07-03
- **Location:** HAYWARD, CA, USA
- **Coordinates:** 37.669845, -122.07933
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** CESSNA
- **Model:** 421B
- **Registration:** N11BU
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## 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 INADEQUATE MAINTENANCE PERFORMED ON THE AIRCRAFT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX92LA276) · AI Analytics · CC0 1.0*