# NTSB Accident LAX94FA383
> **MCDONNELL DOUGLAS 520N** · 1994-09-28 · MESA, AZ, USA · FATL
## Event
- **NTSB number:** LAX94FA383
- **Event ID:** 20001206X02276
- **Type:** Accident
- **Date:** 1994-09-28
- **Location:** MESA, AZ, USA
- **Coordinates:** 33.429454, -111.710746
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 4
## Aircraft
- **Make:** MCDONNELL DOUGLAS
- **Model:** 520N
- **Registration:** N520NT
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

FAILURE OF THE CHASE HELICOPTER PILOT TO MAINTAIN CLEARANCE FROM THE LEAD HELICOPTER DURING A NIGHT APPROACH TO LAND. POSSIBLE FACTORS RELATING TO THE ACCIDENT WERE: DARKNESS, AND INADEQUATE RADIO COORDINATION BETWEEN FLIGHT CREWS OF THE TWO HELICOPTERS.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX94FA383) · AI Analytics · CC0 1.0*