# NTSB Accident ATL91LA139
> **CESSNA 172P** · 1991-07-22 · SYLVA, NC, USA · NONE
## Event
- **NTSB number:** ATL91LA139
- **Event ID:** 20001212X17447
- **Type:** Accident
- **Date:** 1991-07-22
- **Location:** SYLVA, NC, USA
- **Coordinates:** 35.369121, -83.219749
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** CESSNA
- **Model:** 172P
- **Registration:** N52433
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE PILOT'S IMPROPER IN-FLIGHT PLANNING, AND HIS FAILURE TO MAINTAIN A PROPER ALTITUDE WHILE MANEUVERING IN THE CANYON.  FACTOR(S) IN THIS ACCIDENT WERE: THE MOUNTAINOUS, BOX CANYON CONDITIONS, THE HIGH DENSITY ALTITUDE, AND THE DOWNDRAFT CONDITIONS AT THE TIME OF THE ACCIDENT.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ATL91LA139) · AI Analytics · CC0 1.0*