# NTSB Accident DEN99FA157
> **Piper PA-28-181** · 1999-09-01 · VILLA GROVE, CO, USA · FATL
## Event
- **NTSB number:** DEN99FA157
- **Event ID:** 20001212X19735
- **Type:** Accident
- **Date:** 1999-09-01
- **Location:** VILLA GROVE, CO, USA
- **Coordinates:** 38.250934, -105.949661
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Piper
- **Model:** PA-28-181
- **Registration:** N4366D
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The flight instructor's improper inflight decision to enter a narrow blind/box canyon, and his misjudgment of the vertical and lateral clearances.  A factor was the downdrafts.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN99FA157) · AI Analytics · CC0 1.0*