# NTSB Accident LAX91FA040
> **BEECH S-35** · 1990-11-20 · KINGMAN, AZ, USA · FATL
## Event
- **NTSB number:** LAX91FA040
- **Event ID:** 20001212X24625
- **Type:** Accident
- **Date:** 1990-11-20
- **Location:** KINGMAN, AZ, USA
- **Coordinates:** 35.240913, -113.76094
## Injuries
- **Highest injury:** FATL
- **Fatal:** 2
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** BEECH
- **Model:** S-35
- **Registration:** N5748K
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

PROPER ALTITUDE NOT MAINTAINED. CONTRIBUTING TO THE ACCIDENT WAS: THE LACK OF SUPPLEMENTAL OXYGEN ON BOARD THE AIRCRAFT, PILOT FATIGUE, IMPROPER USE OF THE AUTO PILOT, AND PILOT COMPLACENCY.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX91FA040) · AI Analytics · CC0 1.0*