# NTSB Accident CHI07LA154
> **Cessna 421** · 2007-05-23 · Chesterfield, MO, USA · SERS
## Event
- **NTSB number:** CHI07LA154
- **Event ID:** 20070525X00643
- **Type:** Accident
- **Date:** 2007-05-23
- **Location:** Chesterfield, MO, USA
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Cessna
- **Model:** 421
- **Registration:** N4082L
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Maintenance personnel failed to comply with an Airworthiness Directive which resulted in the total failure of the starter adapter gear teeth and the crankshaft gear teeth and the pilot failed to follow the published emergency procedures.  Contributing to the accident were the low altitude at which the loss of power occurred, the power lines, and the unsuitable terrain which prevented the pilot from adequately flaring the airplane and resulted in the subsequent hard landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI07LA154) · AI Analytics · CC0 1.0*