# NTSB Accident CEN11LA404
> **AYRES CORPORATION S2R-T34** · 2011-06-16 · Athleimer, AR, USA · MINR
## Event
- **NTSB number:** CEN11LA404
- **Event ID:** 20110620X20126
- **Type:** Accident
- **Date:** 2011-06-16
- **Location:** Athleimer, AR, USA
- **Coordinates:** 34.319721, -91.84111
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** AYRES CORPORATION
- **Model:** S2R-T34
- **Registration:** N30902
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Failure of the first stage planetary gearset in the propeller reduction gearbox, which resulted in catastrophic engine failure. Contributing to the failure was the misrepresentation of the gearset being zero-timed by the company that sold the gearset to the operator. Also contributing was the total accumulated hours on the used gearset, which were beyond the manufacturer's recommended time between overhaul.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN11LA404) · AI Analytics · CC0 1.0*