# NTSB Accident CHI97LA142
> **Mooney M20F** · 1997-05-20 · WHEELING, IL, USA · NONE
## Event
- **NTSB number:** CHI97LA142
- **Event ID:** 20001208X07881
- **Type:** Accident
- **Date:** 1997-05-20
- **Location:** WHEELING, IL, USA
- **Coordinates:** 42.129714, -87.920471
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Mooney
- **Model:** M20F
- **Registration:** N6950V
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

binding of the number four exhaust valve, which resulted in a partial power loss.  A factor was the ravine.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI97LA142) · AI Analytics · CC0 1.0*