# NTSB Accident LAX97LA034
> **McDonnell Douglas MD-600** · 1996-11-04 · FLAGSTAFF, AZ, USA · NONE
## Event
- **NTSB number:** LAX97LA034
- **Event ID:** 20001208X07065
- **Type:** Accident
- **Date:** 1996-11-04
- **Location:** FLAGSTAFF, AZ, USA
- **Coordinates:** 35.22948, -111.72055
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** McDonnell Douglas
- **Model:** MD-600
- **Registration:** N630N
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAWN
- **Weather:** VMC
## Probable cause

An uncommanded main rotor blade to tail boom contact due to a 'blowback' phenomena after a successful preplanned autorotation by the pilot to a high density altitude airport with a test aircraft designed at a maximum gross weight.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX97LA034) · AI Analytics · CC0 1.0*