# NTSB Accident WPR14LA242
> **ADAMS DRAGONFLY** · 2014-06-12 · Mesa, AZ, USA · NONE
## Event
- **NTSB number:** WPR14LA242
- **Event ID:** 20140612X13532
- **Type:** Accident
- **Date:** 2014-06-12
- **Location:** Mesa, AZ, USA
- **Coordinates:** 33.474998, -111.709724
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** ADAMS
- **Model:** DRAGONFLY
- **Registration:** N85TL
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A partial loss of engine power due to a reduction in the No. 3 cylinder’s compression as a result of the exhaust valve not having consistent uniform contact with the cylinder head valve seat.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR14LA242) · AI Analytics · CC0 1.0*