# NTSB Accident LAX90DUJ03
> **HILLER UH-12E** · 1989-10-11 · YUMA, AZ, USA · SERS
## Event
- **NTSB number:** LAX90DUJ03
- **Event ID:** 20001213X29620
- **Type:** Accident
- **Date:** 1989-10-11
- **Location:** YUMA, AZ, USA
- **Coordinates:** 32.67937, -114.659225
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** HILLER
- **Model:** UH-12E
- **Registration:** N689SB
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

THE PILOT MISJUDGED THE FLARE ALTITUDE. CONTRIBUTING TO THIS ACCIDENT WAS THE FAILURE OF THE ENGINE TORSIONAL COUPLING WHICH ULTIMATELY CAUSED THE TOTAL LOSS OF POWER.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX90DUJ03) · AI Analytics · CC0 1.0*