# NTSB Accident FTW89MA047
> **MCDONNELL DOUGLAS DC-9-32F** · 1989-02-09 · SALT LAKE CITY, UT, USA · FATL
## Event
- **NTSB number:** FTW89MA047
- **Event ID:** 20001213X27734
- **Type:** Accident
- **Date:** 1989-02-09
- **Location:** SALT LAKE CITY, UT, USA
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 2
## Aircraft
- **Make:** MCDONNELL DOUGLAS
- **Model:** DC-9-32F
- **Registration:** N935F
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** NDRK
- **Weather:** VMC
## Probable cause

IMPROPER IN-FLIGHT PLANNING/DECISION BY THE CAPTAIN (PILOT-IN-COMMAND)  AND  HIS IMPROPER USE OF THE PORTABLE OXYGEN SYSTEM, WHICH RESULTED IN HIS INCAPACITATION DUE TO HYPOXIA.  FACTORS RELATED TO THE ACCIDENT WERE:  INADEQUATE MAINTENANCE/INSPECTION OF THE AIRCRAFT  BY COMPANY MAINTENANCE BY FAILING TO REINSTALL THE AFT PRESSURE BULKHEAD HATCH (INSPECTION DOOR) AND POOR CREW COORDINATION.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=FTW89MA047) · AI Analytics · CC0 1.0*