# NTSB Accident WPR23LA255
> **AVIA STROITEL AC-5M** · 2023-07-05 · North Plains, OR, USA · SERS
## Event
- **NTSB number:** WPR23LA255
- **Event ID:** 20230705192533
- **Type:** Accident
- **Date:** 2023-07-05
- **Location:** North Plains, OR, USA
- **Coordinates:** 45.576414, -123.06036
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** AVIA STROITEL
- **Model:** AC-5M
- **Registration:** N40233
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot’s failure to maintain control of the motor glider, which resulted in an inflight overstress separation of the right wing during a high-speed, high-wing-load spiral dive recovery. Contributing to the accident was the inadequately manufactured wing structure.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR23LA255) · AI Analytics · CC0 1.0*