# NTSB Accident CEN12LA120
> **CONTINENTAL COPTERS INC. 47G2** · 2012-01-01 · Lohn, TX, USA · SERS
## Event
- **NTSB number:** CEN12LA120
- **Event ID:** 20120103X02043
- **Type:** Accident
- **Date:** 2012-01-01
- **Location:** Lohn, TX, USA
- **Coordinates:** 31.325, -99.408332
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** CONTINENTAL COPTERS INC.
- **Model:** 47G2
- **Registration:** N9021R
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The improper installation of the tail rotor gearbox by maintenance personnel, which led to accelerated wear of the ring and pinion gears, resulting in the loss of tail rotor effectiveness and subsequent forced landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN12LA120) · AI Analytics · CC0 1.0*