# NTSB Accident WPR21LA151
> **PIPER PA-28-140** · 2021-03-29 · Yacolt, WA, USA · MINR
## Event
- **NTSB number:** WPR21LA151
- **Event ID:** 20210330102838
- **Type:** Accident
- **Date:** 2021-03-29
- **Location:** Yacolt, WA, USA
- **Coordinates:** 45.851889, -122.2613
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** PIPER
- **Model:** PA-28-140
- **Registration:** N665FL
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A partial loss of power caused by carbon build up in the cylinders, which prevented the exhaust valves from seating properly. Contributing to the accident was flying in moderate icing conditions which resulted in reduced aircraft performance and vibrations.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR21LA151) · AI Analytics · CC0 1.0*