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NTSB Report
February 19, 1990 · Lockheed L-1011-385-1 L-1011-385 · N31013
Los Angeles, CA
Overview
Report Status
Probable Cause
Event Type
Incident
Date
February 19, 1990
Injury Outcomes
1 injury (1 minor injury), 192 uninjured
Location
Los Angeles, CA
Aircraft
Lockheed L-1011-385-1 L-1011-385
Tail Number
N31013
Operator
Twa
Injuries
Minor
Aircraft Damage
Minor
NTSB Number
LAX90IA101
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).
NTSB Probable Cause
THE FAILURE OF THE WELD HOLDING THE SLIP JOINT TO THE PNEUMATIC DUAL COMPENSATOR FROM THE NO. 2 ENGINE.
Full Narrative
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).
Flight
Event TypeIncident
Event Time16:22 PST
Nearest AirportLas Angeles (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftLockheed L-1011-385-1 L-1011-385
Tail NumberN31013
Aircraft CategoryAir
DamageMinor
OperatorTwa
Operating RulePart 121
Engines3
Engine TypeTurbofan
Engine DetailsUnknown · UNKNOWN · Turbofan
People & Injuries
Injury Summary1 injury (1 minor injury), 192 uninjured
Fatal0
Serious0
Minor1
Uninjured192
Total193
Crew 1First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT