# NTSB CHI83LA272: Douglas DC-9-30, N980Z, Milwaukee, WI, June 21, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: June 21, 1983, 07:15 local (12:15 UTC)
- Place: Milwaukee, WI
- Location: 42.9469° N, 87.8971° W: Placed by OpenAirDocs at GENERAL MITCHELL INTL (MKE), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.9469&lon=-87.8971&mi=10
- Phase of flight: [Other](https://openairdocs.org/ntsb-phases/800) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 9 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12224
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI83LA272
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12224/pdf
- Page: https://openairdocs.org/ntsb/CHI83LA272

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, other
  - airport facilities,ramp facilities - failure,total (cause)

## Analysis

A JETWAY COLLAPSED AS PASSENGER LOADING COMMENCED. THE DRIVE GEAR FAILED & OIL WAS FOUND TO BE CONTIMINATED WITH WATER. HEAT HAD TRANSFERRED TO THE WORM GEAR WHICH WAS MISALIGNED & WAS NOT MANUFACTURED FOR ACFT USE SPECIFICATIONS.

## Aircraft

- Registration: [N980Z](https://openairdocs.org/deregistered/N980Z-2001-08-24), registration cancelled 2001-08-24, S/N 47344 (OpenAirDocs)
- Reported make and model: DOUGLAS DC-9-30
- Registry model: [Mcdonnell Douglas DC-9-31](https://openairdocs.org/model/mcdonnell-douglas-dc-9-31) (registry code 302206A) (OpenAirDocs)
- Category: Airplane
- Engines: P&W JT8D-7 turbo jet
- Damage: Minor damage
- Flight: Part 121
- Registered owner: Ozark Airlines, Inc.
- Airworthiness certificate: Standard, Transport
- Departed: MKE, MILWAUKEE, WI
- Flight plan: Unknown
- Airport: MKE, Mitchell

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 14,370 total, 9,056 in this make and model, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 180° at 5 knots
- Visibility: 3 statute miles
- Lowest ceiling: none
- Temperature: 66 °F
- Altimeter: 30.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19830621035179I](https://openairdocs.org/incident/19830621035179I), Jun 21, 1983: Doug DC931, Milwaukee, WI, Minor damage. While boarding passengers the jet way collapsed. Aircraft sustained minor damage. One passenger injured.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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