# NTSB Accident MIA94FA001
> **MCDONNELL DOUGLAS MD-83** · 1993-10-03 · MIAMI, FL, USA · SERS
## Event
- **NTSB number:** MIA94FA001
- **Event ID:** 20001211X13610
- **Type:** Accident
- **Date:** 1993-10-03
- **Location:** MIAMI, FL, USA
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 80
- **Total aboard:** 82
## Aircraft
- **Make:** MCDONNELL DOUGLAS
- **Model:** MD-83
- **Registration:** 9YTHR
- **FAR Part:** 129
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FAILURE OF THE WATER HEATER RELAY AND THE OVERPRESSURE RELIEF VALVE TO OPERATE PROPERLY. IN ADDITION, THE DESIGN OF THE RELIEF VALVE WAS INADEQUATE IN THAT IT ALLOWED THE O-RING TO MIGRATE FROM ITS NORMAL POSITION PREVENTING THE VALVE FROM OPENING.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA94FA001) · AI Analytics · CC0 1.0*