# NTSB CHI93LA327: British Aerospace ATP, N852AW, Green Bay, WI, May 7, 1993

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: May 7, 1993, 11:40 local (16:40 UTC)
- Place: Green Bay, WI
- Coordinates: 44.540271, -88.049354 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.5403&lon=-88.0494&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 33 uninjured
- Status: Completed, report August 17, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 9285
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI93LA327
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9285/pdf
- Page: https://openairdocs.org/ntsb/CHI93LA327

## Probable cause

the passenger's loss of footing (miscellaneous).

## Sequence of events

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

- Miscellaneous/other, standing - engine(s) not operating
  - miscellaneous, passenger (cause)

## Analysis

A 73 YEAR-OLD PASSENGER WAS ATTEMPTING TO BOARD THE AIRPLANE USING THE AIRPLANE'S INTEGRAL AIRSTAIRS/DOOR. SHE LOST HER BALANCE AND FELL. SHE WAS TRANSPORTED TO A LOCAL HOSPITAL AND TREATED FOR A FRACTURED LEFT KNEECAP.

## Factual narrative

On May 7, 1993, about 1140 central daylight time, a passenger attempting to board Air Wisconsin flight 5270 at Green Bay, Wisconsin, fell on the airplane's integral airstair door and fractured her left knee cap.  The airplane, N852AW, a British Aerospace ATP, was not damaged.  The destination of the 14 CFR Part 121 passenger flight was Chicago, Illinois.  Visual meteorological conditions existed at Green Bay at the time of the accident.

The 73 year-old passenger reported she had made the first step, but her foot caught on the second step before she had grasped the hand rail.  She said she then lost her balance and fell.

The passenger was treated by paramedics and transported to a local hospital.

## Aircraft

- Registration: [N852AW](https://openairdocs.org/deregistered/N852AW-2001-01-09), registration cancelled 2001-01-09, S/N 2021 (OpenAirDocs)
- Reported make and model: BRITISH AEROSPACE ATP
- Registry model: [British Aerospace BAE ATP](https://openairdocs.org/model/british-aerospace-bae-atp) (registry code 1500300) (OpenAirDocs)
- Category: Airplane
- Serial number: 2021
- Engines: turbo prop
- Damage: No damage
- Flight: Part 121
- Operator: Air Wisconsin, doing business as United Express
- Registered owner: Air Wisconsin
- Airworthiness certificate: Standard, Transport
- Destination: ORD, CHICAGO, IL
- Flight plan: IFR
- Airport: GRB, Austin Strabel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 37; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 12,125 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 150° at 7 knots
- Visibility: 10 statute miles
- Lowest ceiling: 11,000 ft broken
- Temperature: 70 °F, dew point 52 °F
- Altimeter: 30.00 inHg
- Observed at: GRB

## FAA reports on this event (1)

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

- [Accident 19930507034169A](https://openairdocs.org/incident/19930507034169A), May 7, 1993: Bag ATP, Green Bay, WI. Passenger boarding on integral airstairs/door lost balance and fell. Rushed to hospital. Broken knee cap.

## Other investigations on N852AW (1)

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.

- [NTSB CHI92IA068](https://openairdocs.org/ntsb/CHI92IA068), Jan 8, 1992: British Aerospace BAE-ATP (N852AW), Fort Wayne, IN, incident, no damage. Probable cause: FAILURE OF COMPANY MAINTENANCE PERSONNEL TO MAINTAIN THE AIRPLANE IN ACCORDANCE WITH EXISTING SERVICE BULLETINS.

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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