# NTSB Accident LAX99LA004
> **Burson REVOLUTION MINI 500** · 1998-10-04 · MOORPARK, CA, USA · FATL
## Event
- **NTSB number:** LAX99LA004
- **Event ID:** 20001211X11285
- **Type:** Accident
- **Date:** 1998-10-04
- **Location:** MOORPARK, CA, USA
- **Coordinates:** 34.189727, -119.170684
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Burson
- **Model:** REVOLUTION MINI 500
- **Registration:** N418MB
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The improper use of the cyclic flight control by the pilot, which resulted in low g flight load condition, which resulted in rotor disk divergence (mast bumping), and the main rotor blade striking and severing the tail boom.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX99LA004) · AI Analytics · CC0 1.0*