# NTSB Accident SEA00TA013
> **Hiller UH-12E** · 1999-11-02 · STITES, ID, USA · SERS
## Event
- **NTSB number:** SEA00TA013
- **Event ID:** 20001212X20183
- **Type:** Accident
- **Date:** 1999-11-02
- **Location:** STITES, ID, USA
- **Coordinates:** 46.080829, -115.97068
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 3
## Aircraft
- **Make:** Hiller
- **Model:** UH-12E
- **Registration:** N5388V
- **FAR Part:** PUBU
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** Unk
## Probable cause

Inadequate inspection of the control rotor cuff by a company mechanic and subsequent fatigue fracture of the cuff, resulting in an inflight separation of the control rotor blade.  Factors contributing to the accident were:  inadequate quality control during manufacture; insufficiently defined manufacturer's inspection and repair procedures; inadequate FAA approval of the manufacturer's inspection and repair procedures; power lines in the helicopter's emergency descent flight path; and reduced aircraft controllability following the control rotor separation.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA00TA013) · AI Analytics · CC0 1.0*