# NTSB Accident MIA00LA225
> **Cessna 421A** · 2000-07-25 · HOMEWOOD, MS, USA · NONE
## Event
- **NTSB number:** MIA00LA225
- **Event ID:** 20001212X21552
- **Type:** Accident
- **Date:** 2000-07-25
- **Location:** HOMEWOOD, MS, USA
- **Coordinates:** 32.35012, -89.4692
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 6
- **Total aboard:** 6
## Aircraft
- **Make:** Cessna
- **Model:** 421A
- **Registration:** N1477D
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The inadequate installation of the right propeller by the mechanic for his failure to properly torque the eight nuts resulting in fatigue failure of the studs and separation of the right propeller during cruise flight.  Findings in the investigation were 1) the mechanic who installed the right propeller used un-calibrated torque wrenches, and 2) the mechanic who installed the right propeller used an outdated Service Manual.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA00LA225) · AI Analytics · CC0 1.0*