# NTSB Accident SEA92LA014
> **PIPER PA-28R-201T** · 1991-10-20 · MONTICELLO, UT, USA · NONE
## Event
- **NTSB number:** SEA92LA014
- **Event ID:** 20001212X18398
- **Type:** Accident
- **Date:** 1991-10-20
- **Location:** MONTICELLO, UT, USA
- **Coordinates:** 37.980129, -109.290145
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 4
- **Total aboard:** 4
## Aircraft
- **Make:** PIPER
- **Model:** PA-28R-201T
- **Registration:** N1087H
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

INADEQUATE MAINTENANCE/OVERHAUL OF THE ENGINE, AND SUBSEQUENT FAILURE OF THE #5 PISTON (HOLE BURNED IN PISTON), DUE TO PRE-IGNITION AND/OR DETONATION.  ROUGH/UNEVEN TERRAIN IN THE EMERGENCY LANDING AREA WAS A RELATED FACTOR.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA92LA014) · AI Analytics · CC0 1.0*