# NTSB Accident CEN12LA525
> **BELL 214ST** · 2012-08-07 · Avalon, TX, USA · NONE
## Event
- **NTSB number:** CEN12LA525
- **Event ID:** 20120807X35254
- **Type:** Accident
- **Date:** 2012-08-07
- **Location:** Avalon, TX, USA
- **Coordinates:** 32.273887, -96.76583
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** BELL
- **Model:** 214ST
- **Registration:** N409SB
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Maintenance personnel’s failure to properly torque the retaining nut and install the cotter pin that secured the helicopter’s tail rotor counterweight bellcrank. Contributing to the accident was the lack of detailed maintenance records that documented previous maintenance actions.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN12LA525) · AI Analytics · CC0 1.0*