# NTSB Accident LAX91LA249
> **HILLER UH-12E** · 1991-06-07 · HURON, CA, USA · NONE
## Event
- **NTSB number:** LAX91LA249
- **Event ID:** 20001212X17302
- **Type:** Accident
- **Date:** 1991-06-07
- **Location:** HURON, CA, USA
- **Coordinates:** 36.200508, -120.090522
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** HILLER
- **Model:** UH-12E
- **Registration:** N507HA
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** NBRT
- **Weather:** VMC
## Probable cause

THAT UNKNOWN PILOT(S) IMPOPERLY USED THE THROTTLE CONTROL WHICH CAUSED AN OVERSPEED CONDITION.  CONTRIBUTING TO THIS ACCIDENT WAS THE CONNECTING ROD BOLT FATIGUE FAILURE.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX91LA249) · AI Analytics · CC0 1.0*