# NTSB CHI92LA250: Boeing 747-300, Chicago, IL, August 23, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: August 23, 1992, 12:33 local (17:33 UTC)
- Place: Chicago, IL
- Location: 41.9769° N, 87.9081° W: Placed by OpenAirDocs at CHICAGO O'HARE INTL (ORD), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.9769&lon=-87.9081&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 serious, 277 uninjured; on the ground: 1 fatal, 1 serious
- Status: Completed, report June 30, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15526
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA250
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15526/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA250

## Probable cause

AN UNSAFE/HAZARDOUS CONDITION THAT WAS NOT IDENTIFIED BY THE VEHICLE DRIVER, AND AN INADEQUATE DISTANCE BETWEEN THE AIRPLANE AND VEHICLE AS THE DRIVER DROVE THE VEHICLE BEHIND THE AIRPLANE.

## Sequence of events

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

- Propeller blast or jet exhaust/suction, standing - engine(s) operating
  - atc clearance - performed, pilot in command
  - inadequate training, company/operator management (contributing factor)
  - unsafe/hazardous condition - not identified, driver of vehicle (cause)
  - distance - inadequate, driver of vehicle (cause)

## Analysis

THE AIRPLANE, A FOUR ENGINED HEAVY JET, WAS DIRECTED TO TAXI TO AN ACTIVE RUNWAY.  THE TAXI ROUTE WOULD EVENTUALLY CROSS AN ACTIVE RUNWAY.  GROUND CONTROL DIRECTED THE AIRPLANE NOT TO CROSS THAT RUNWAY.  THIS COMMAND WAS ACKNOWLEDGED BY THE AIRCREW.  THE AIRPLANE STOPPED AND HELD ITS SOUTHERLY ORIENTED POSITION ON THE NORTH-SOUTH ORIENTED TAXIWAY WHICH INTERSECTED THE ACTIVE RUNWAY.  WHILE THE AIRPLANE WAS STOPPED, A MAINTENANCE UTILITY TRUCK OPERATED BY ANOTHER AIRLINE CAME TO A STOP ON THE EAST SIDE OF THE SERVICE ROAD WHICH CROSSED PERPENDICULAR TO THE TAXIWAY THE AIRPLANE WAS POSITIONED ON.  GROUND CONTROL DIRECTED THE AIRPLANE TO CONTINUE TAXIING. AS THE AIRPLANE BEGAN TO POWERUP, THE SERVICE TRUCK DROVE BEHIND IT.  THE TRUCK WAS STRUCK BY THE AIRPLANE'S JETBLAST AND ROLLED OVER TWO OR THREE TIMES.  A REVIEW OF THE AIRPORT'S MOTOR VEHICLE OPERATING REGULATIONS HANDBOOK AND THE AIRLINE'S DRIVER TRAINING PROGRAM REVEALED THE DANGERS OF JETBLAST TO MOTOR VEHICLES WERE NOT COVERED.

## Aircraft

- Registration: HL746 (not matched to a registry record)
- Reported make and model: BOEING 747-300
- Category: Airplane
- Engines: turbo fan
- Damage: No damage
- Flight: Part 129
- Operator: Korean Airlines
- Registered owner: Korean Airlines
- Airworthiness certificate: Standard, Transport
- Last inspection: Unknown, January 2, 2000
- Departed: ORD
- Destination: ANC, ANCHORAGE, AK
- Flight plan: IFR
- Airport: ORD, Chicago O'Hare Intl

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; foreign; medical: unknown, unknown

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 8 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 68 °F
- Altimeter: 30.00 inHg
- Observed at: ORD, 1 nm away

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.