# NTSB Accident MIA99LA117
> **Waco YMF-5** · 1999-04-02 · BOCA RATON, FL, USA · SERS
## Event
- **NTSB number:** MIA99LA117
- **Event ID:** 20001205X00523
- **Type:** Accident
- **Date:** 1999-04-02
- **Location:** BOCA RATON, FL, USA
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Waco
- **Model:** YMF-5
- **Registration:** N820MM
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The pilot's failure to select a suitable forced landing site following a partial loss of engine power due to failed cylinder holdddown studs, and the subsequent collision with trees.  A factor in the accident was the reduced forward visibility from the dual open cockpits due to windshield obscuration by engine oil.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=MIA99LA117) · AI Analytics · CC0 1.0*