# NTSB CHI89IA140: Mcdonnell Douglas DC-10-10, N1846U, Chicago, IL, July 19, 1989

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: July 18, 1989, 19:05 local (Jul 19, 1989, 00:05 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: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 250 uninjured
- Status: Completed, report October 7, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14285
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI89IA140
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14285/pdf
- Page: https://openairdocs.org/ntsb/CHI89IA140

## Probable cause

HYDROPLANING ATTRIBUTED TO THE PHYSICAL CONDITION OF THE RUNWAY, AND THE AIRPORT PERSONNEL'S FAILURE TO ADEQUATELY MAINTAIN THE RUNWAY. CONTRIBUTING FACTORS WERE: THE RAIN AND THE WET RUNWAY.

## Sequence of events

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

- Overrun, landing - roll
  - weather condition - rain (contributing factor)
  - airport facilities,runway/landing area condition - wet (contributing factor)
  - airport facilities,runway/landing area condition - not maintained (cause)
  - runway maintenance - inadequate, airport personnel (cause)
  - aircraft performance,hydroplaning condition - water (cause)

## Analysis

THE AIRPLANE HYDROPLANED AFTER LANDING AND RAN OFF THE END OF THE RUNWAY. RUNWAY INSPECTION REVEALED THAT THE RUNWAY GROOVING ALONG THE AIRPLANE'S LANDING ROLL TRACK WAS WORN TO THE POINT TO WHICH IT WAS NONEXISTENT, AND THERE WERE LARGE AREAS OF STANDING WATER ON THE RUNWAY. THE AIRPORT HAD RECORDED 1.28 INCHES OF RAINFALL DURING THE FOUR HOUR PERIOD IMMEDIATELY PRECEDING THE INCIDENT.

## Aircraft

- Registration: N1846U (not matched to a registry record)
- Reported make and model: MCDONNELL DOUGLAS DC-10-10
- Category: Airplane
- Serial number: 48262
- Airframe hours: 28724
- Engines: GE CF6-6D 39300 lbs thrust turbo fan
- Damage: No damage
- Flight: Part 121
- Operator: United Airlines, doing business as United Airlines
- Registered owner: United Airlines
- Airworthiness certificate: Standard, Transport
- Last inspection: AAIP, July 10, 1989, 121 hours before
- Departed: CLE, CLEVELAND, OH
- Flight plan: IFR
- Airport: ORD, O'Hare Intl, runway 22R, 7,500 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial, flight engineer, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 16,000 total, 2,450 in this make and model, 8,000 as pilot in command, 110 in the last 90 days, 29 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 4 knots
- Visibility: 3 statute miles
- Lowest ceiling: 6,000 ft overcast
- Temperature: 63 °F, dew point 61 °F
- Altimeter: 29.00 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.

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