# NTSB CHI82IA026: Lockheed L-1011, N31031, Chicago, IL, January 13, 1982

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: January 12, 1982, 18:30 local (Jan 13, 1982, 00:30 UTC)
- Place: Chicago, IL
- Location: 41.8500° N, 87.6501° W: Placed by OpenAirDocs: center of Chicago, IL, within about 9 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.8500&lon=-87.6501&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 149 uninjured
- Status: Completed, report January 12, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70223
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI82IA026
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70223/pdf
- Page: https://openairdocs.org/ntsb/CHI82IA026

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - electrical system,generator - disabled (contributing factor)
  - electrical system,generator - other (cause)
  - electrical system,electric relay - shorted (cause)

## Analysis

THE AIRCRAFT HAD DEPARTED BOSTON ON A SCHEDULED FLIGHT WITH THE #1 GENERATOR PLACARDED INOPERATIVE AND NOTED IN THE MINIMUM EQUIPMENT LIST. EN ROUTE TO LOS ANGELES, CA AT FL 350, ABOUT 80 MI NORTHEAST OF BAY CITY, MN., THE CREW NOTED A SIMULTANEOUS LOSS OF #2 AND #3 GENERATORS AND ALL AC POWER. AFTER EXECUTING THE EMERGENCY PROCEDURES AND RESTORING POWERVIA THE APU, THE FLIGHT DIVERTED TO CHICAGO, IL AND MADE A NORMAL LANDING. INVESTIGATION REVEALED THAT THE NUMBER THREE GENERATOR HAD AN OPEN FIELD LINING AND THE NUMBER TWO GENERATOR CONTROL UNIT HAD A DEFECTIVE "A" PHASE. THE #1 GENERATORHAD EXPERIENCE A SPRAGUE CLUTCH FAILURE.

## Aircraft

- Registration: [N31031](https://openairdocs.org/deregistered/N31031-2000-07-10), registration cancelled 2000-07-10, S/N 193B-1115 (OpenAirDocs)
- Reported make and model: LOCKHEED L-1011
- Registry model: [Lockheed L-1011-385-1-15](https://openairdocs.org/model/lockheed-l-1011-385-1-15) (registry code 5265015) (OpenAirDocs)
- Category: Airplane
- Serial number: 193B-1115
- Airframe hours: 18755
- Engines: ROLLS ROYCE RB-211 42000 lbs thrust turbo fan
- Damage: No damage
- Flight: Part 121
- Operator: Trans World Airlines
- Registered owner: Trans World Airlines
- Departed: BOSTON, MA
- Destination: LOS ANGELES, CA
- Flight plan: IFR
- Airport: ORD, Chicago O'Hare Inter'L, runway 14, 11,600 × 200 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.

## Weather

- Conditions: Night/dark
- Wind: calm
- Visibility: 3 statute miles
- Lowest ceiling: 1,500 ft
- Temperature: 52 °F
- Altimeter: 30.00 inHg
- Observed at: ORD

## 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 19820112005449I](https://openairdocs.org/incident/19820112005449I), Jan 12, 1982: Lkheed 1011*, Chicago, IL. Za one generator out prior takeoff. Two quit in flight. Fourth generator unable to take load. Used APU for power.

## Other investigations on N31031 (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 NYC96FA174](https://openairdocs.org/ntsb/NYC96FA174), Aug 25, 1996: Lockheed L-1011-100 (N31031), Jamaica, NY, substantial damage. Probable cause: failure of the flight crew to complete the published checklist and to adequately cross-check the actions of each other, which resulted in their failure to detect that the leading edge slats had not…

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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