# NTSB Accident MIA97LA222
> **Waco YMF5** · 1997-07-28 · LAKE BUENA VIST, FL, USA · NONE
## Event
- **NTSB number:** MIA97LA222
- **Event ID:** 20001208X08472
- **Type:** Accident
- **Date:** 1997-07-28
- **Location:** LAKE BUENA VIST, FL, USA
- **Coordinates:** 28.370544, -81.550949
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** Waco
- **Model:** YMF5
- **Registration:** N14128
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

failure of maintenance personnel to follow installation procedures pertaining to the torque of the propeller retention nut, which resulted in a loose propeller retention nut, subsequent fatigue failure of the crankshaft, and loss of engine power.  The lack of suitable terrain for an emergency landing was a related factor.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA97LA222) · AI Analytics · CC0 1.0*