# NTSB Accident LAX04LA254
> **Eurocopter AS-350-B2** · 2004-07-01 · Scottsdale, AZ, USA · MINR
## Event
- **NTSB number:** LAX04LA254
- **Event ID:** 20040708X00933
- **Type:** Accident
- **Date:** 2004-07-01
- **Location:** Scottsdale, AZ, USA
- **Coordinates:** 33.700553, -111.941947
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 2
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Eurocopter
- **Model:** AS-350-B2
- **Registration:** N513TS
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

Inadvertent in-flight engagement of the collective down lock, which resulted in an uncontrolled descent and ground impact. The collective down lock engagement was caused by the improper installation and/or adjustment of the collective locking system, which reduced the clearance between the locking plate and the collective control. A factor was the pilot’s decision to embark on a maintenance test flight after encountering difficulty disengaging the collective lock release during previous hover tests.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX04LA254) · AI Analytics · CC0 1.0*