# NTSB LAX90IA101: Lockheed L-1011-385-1, N31013, Los Angeles, CA, February 19, 1990

- Type: NTSB incident investigation
- Classification: Incident · Minor injuries · Incident investigation · Final report
- Date: February 18, 1990, 16:22 local (Feb 19, 1990, 00:22 UTC)
- Place: Los Angeles, CA
- Location: 33.9425° N, 118.4080° W: Placed by OpenAirDocs at LOS ANGELES INTL (LAX), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.9425&lon=-118.4080&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 192 uninjured
- Status: Completed, report December 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 26660
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX90IA101
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/26660/pdf
- Page: https://openairdocs.org/ntsb/LAX90IA101

## Probable cause

THE FAILURE OF THE WELD HOLDING THE SLIP JOINT TO THE PNEUMATIC DUAL COMPENSATOR FROM THE NO. 2 ENGINE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - aborted
  - pneumatic system - separation (cause)

## Analysis

THE WELD AT A SLIP JOINT TO THE PNEUMATIC DUAL COMPENSATOR FOR THE NO. 2 ENGINE ON A LOCKHEED L-1011-385-1 SEPARATED IN THE MID-CARGO COMPARTMENT AREA. THAT BLEED AIR FROM THE ENGINE ACTIVATED THE FIRE WARNING LASP CIRCUITY IN THE AREA ALERTING THE CREW. THIS IS THE THIRD KNOWN SEPARATION OF THIS UNIT. THESE ITEMS ARE ON THE C-PHASE INSPECTION. TWO SERVICE BULLETINS WERE ISSUED IN 1978 AND REVISED IN 1984 (SB09336-041).

## Aircraft

- Registration: [N31013](https://openairdocs.org/deregistered/N31013-2013-06-27), registration cancelled 2013-06-27, S/N 193B-1035, built 1973 (OpenAirDocs)
- Reported make and model: LOCKHEED L-1011-385-1 (L-1011-385)
- Registry model: [Lockheed L-1011-385-1](https://openairdocs.org/model/lockheed-l-1011-385-1) (registry code 5265010) (OpenAirDocs)
- Registry engine: [Rolls-Royce RB-211-22 series](https://openairdocs.org/engine/rolls-royce-rb-211-22-series) (registry code 54554, turbo-fan) (OpenAirDocs)
- Category: Airplane
- Serial number: 193B-1115
- Engines: UNKNOWN UNKNOWN turbo fan
- Damage: Minor damage
- Flight: Part 121
- Operator: Twa
- Registered owner: Unknown
- Destination: NYC, NEW YORK, NY
- Flight plan: IFR
- Airport: LAX, Las Angeles

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, unknown; flight hours: 15,000 total

## Weather

- Conditions: Visual (VMC), Day

## 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 19900218019649I](https://openairdocs.org/incident/19900218019649I), Feb 18, 1990: Lkheed 10113851, Los Angeles, CA, Minor damage. Overheat warning and smoke in cabin on takeoff. Aborted. Evacuated. Weld on bleed air duct failed.

## Other investigations on N31013 (4)

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 MKC85IA131](https://openairdocs.org/ntsb/MKC85IA131), Jun 11, 1985: Lockheed L-1011 (N31013), St. Louis, MO, incident, minor damage
- [NTSB MKC83IA115](https://openairdocs.org/ntsb/MKC83IA115), May 25, 1983: Lockheed L-1011-385-1 (N31013), St. Louis, MO, incident, minor damage
- [NTSB MKC76AK058](https://openairdocs.org/ntsb/MKC76AK058), Jun 1, 1976: Lockheed L-1011 (N31013), Salina, KS, substantial damage
- [NTSB LAX76IL023](https://openairdocs.org/ntsb/LAX76IL023), Oct 2, 1975: Lockheed 1011 (N31013), Philadelphia, PA, incident, no damage

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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