# NTSB Accident SEA95LA078
> **BELL UH-1B** · 1995-04-22 · WALLA WALLA, WA, USA · SERS
## Event
- **NTSB number:** SEA95LA078
- **Event ID:** 20001207X03382
- **Type:** Accident
- **Date:** 1995-04-22
- **Location:** WALLA WALLA, WA, USA
- **Coordinates:** 46.109668, -118.300659
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** BELL
- **Model:** UH-1B
- **Registration:** N39SD
- **FAR Part:** 133
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

TOTAL FAILURE OF THE FREEWHEELING SPRAG UNIT. A FACTOR TO THE ACCIDENT WAS: SUITABLE TERRAIN WAS NOT AVAILABLE FOR LANDING.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA95LA078) · AI Analytics · CC0 1.0*