# NTSB Accident BFO94LA010
> **GULFSTREAM AMERICAN AA-5B** · 1993-11-14 · STERLING, MA, USA · MINR
## Event
- **NTSB number:** BFO94LA010
- **Event ID:** 20001211X13703
- **Type:** Accident
- **Date:** 1993-11-14
- **Location:** STERLING, MA, USA
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 4
- **Uninjured:** 0
- **Total aboard:** 4
## Aircraft
- **Make:** GULFSTREAM AMERICAN
- **Model:** AA-5B
- **Registration:** N28215
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

SEPARATION OF THE NUMBER ONE EXHAUST VALVE DUE TO FATIGUE CRACKING WHICH RESULTED IN LOSS OF ENGINE POWER.  OTHER RELATED FACTORS WERE MISJUDGMENT OF ALTITUDE AND AIRSPEED BY THE PILOT RESULTING IN ON GROUND COLLISION WITH THE TERRAIN AND SUBSEQUENT NOSE OVER.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=BFO94LA010) · AI Analytics · CC0 1.0*