# NTSB Accident DCA22MA193
> **DEHAVILLAND DHC-3** · 2022-09-04 · Freeland, WA, USA · FATL
## Event
- **NTSB number:** DCA22MA193
- **Event ID:** 20220905105855
- **Type:** Accident
- **Date:** 2022-09-04
- **Location:** Freeland, WA, USA
- **Coordinates:** 47.99032, -122.58502
## Injuries
- **Highest injury:** FATL
- **Fatal:** 10
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 10
## Aircraft
- **Make:** DEHAVILLAND
- **Model:** DHC-3
- **Registration:** N725TH
- **FAR Part:** 135
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The in-flight unthreading of the clamp nut from the horizontal stabilizer trim actuator barrel due to a missing lock ring, which resulted in the horizontal stabilizer moving to an extreme trailing-edge-down position rendering the airplane’s pitch uncontrollable.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DCA22MA193) · AI Analytics · CC0 1.0*