# NTSB Accident CHI91DEP12
> **Schweizer G-164-A** · 1991-08-20 · ELKHORN, WI, USA · NONE
## Event
- **NTSB number:** CHI91DEP12
- **Event ID:** 20001212X17794
- **Type:** Accident
- **Date:** 1991-08-20
- **Location:** ELKHORN, WI, USA
- **Coordinates:** 42.66991, -88.540283
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Schweizer
- **Model:** G-164-A
- **Registration:** N48635
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE PILOT IN COMMAND'S FAILURE TO MAINTAIN ADEQUATE ALTITUDE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI91DEP12) · AI Analytics · CC0 1.0*