# NTSB Accident WPR20CA132
> **COOK SONEX** · 2020-04-27 · Upland, CA, USA · NONE
## Event
- **NTSB number:** WPR20CA132
- **Event ID:** 20200427X25753
- **Type:** Accident
- **Date:** 2020-04-27
- **Location:** Upland, CA, USA
- **Coordinates:** 34.110553, -117.681945
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** COOK
- **Model:** SONEX
- **Registration:** N1222C
- **FAR Part:** 091
- **Engines:** —
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A gradual loss of engine power during takeoff due to the pressure regulator not keeping continuous fuel pressure which led to a precautionary off airport landing and collision with terrain.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR20CA132) · AI Analytics · CC0 1.0*