# NTSB Accident CHI99LA275
> **Fairchild 24 C8C** · 1999-07-28 · LA FAYETTE, IL, USA · NONE
## Event
- **NTSB number:** CHI99LA275
- **Event ID:** 20001212X19225
- **Type:** Accident
- **Date:** 1999-07-28
- **Location:** LA FAYETTE, IL, USA
- **Coordinates:** 41.100547, -89.969261
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Fairchild
- **Model:** 24 C8C
- **Registration:** N15345
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the pilot's failure to obtain/maintain the proper descent rate.  A factor to the accident was the partial loss of engine power as a result of the exhaust valve keeper becoming unlocked, which jammed the exhaust valve.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI99LA275) · AI Analytics · CC0 1.0*