# NTSB Incident SEA91IA219
> **BOEING 747-151** · 1991-08-22 · SEATTLE, WA, USA · MINR
## Event
- **NTSB number:** SEA91IA219
- **Event ID:** 20001212X17976
- **Type:** Incident
- **Date:** 1991-08-22
- **Location:** SEATTLE, WA, USA
- **Coordinates:** 47.439151, -122.280639
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 11
- **Uninjured:** 376
- **Total aboard:** 387
## Aircraft
- **Make:** BOEING
- **Model:** 747-151
- **Registration:** N604US
- **FAR Part:** 121
- **Engines:** 4
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A FIRE IN THE NUMBER 4 ENGINE, RESULTING FROM A FUEL LEAK AT THE MAIN FUEL CONTROL UNIT, DUE TO IMPROPER MAINTENANCE BY UNKNOWN/UNDETERMINED PERSON. THE L5 EMERGENCY EXIT FAILED TO OPERATEE DUE TO A BROKEN PLASTIC PULLEY GUARD IN THE SLIDE RELEASE MECHANISM.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA91IA219) · AI Analytics · CC0 1.0*