# NTSB Accident CHI91LA244
> **AEROSTAR RAVEN 557A** · 1991-08-04 · INDIANOLA, IA, USA · NONE
## Event
- **NTSB number:** CHI91LA244
- **Event ID:** 20001212X17808
- **Type:** Accident
- **Date:** 1991-08-04
- **Location:** INDIANOLA, IA, USA
- **Coordinates:** 41.360851, -93.560462
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** AEROSTAR
- **Model:** RAVEN 557A
- **Registration:** N3621X
- **FAR Part:** 091
- **Engines:** 0
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FAILURE OF THE PILOT TO MAINTAIN ALTITUDE.  FACTORS ASSOCIATED WITH THE ACCIDENT ARE COMPLACENCY AND DIVERTED ATTENTION.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91LA244) · AI Analytics · CC0 1.0*