# NTSB Accident FTW99LA227
> **Aeronca 11AC** · 1999-08-14 · ROCKWALL, TX, USA · NONE
## Event
- **NTSB number:** FTW99LA227
- **Event ID:** 20001212X19519
- **Type:** Accident
- **Date:** 1999-08-14
- **Location:** ROCKWALL, TX, USA
- **Coordinates:** 32.919818, -96.449043
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Aeronca
- **Model:** 11AC
- **Registration:** N3184E
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The mechanic's improper machining of the crankshaft during a major overhaul, which resulted in a fatigue crack and subsequent failure of the crankshaft.  A factor was the lack of suitable terrain for the forced landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=FTW99LA227) · AI Analytics · CC0 1.0*