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NTSB Report
November 2, 1984 · Boeing 747-131 · N93106
Los Angeles, CA
Overview
Report Status
Preliminary report
Event Type
Incident
Date
November 2, 1984
Injury Outcomes
No injuries (365 uninjured)
Location
Los Angeles, CA
Aircraft
Boeing 747-131
Tail Number
N93106
Operator
Trans World Airlines
Injuries
None
Aircraft Damage
Minor
NTSB Number
LAX85IA037
DURING DARKNESS, A BOEING 747, N93106, WAS BEING TAXIED FOR DEPARTURE WHEN ITS LEFT WING COLLIDED WITH THE RIGHT WING OF A BOEING 767 BEING TOWED IN THE SAME DIRECTION ON A PARALLEL TAXIWAY. BOTH CREWS HAD OBTAINED GROUND CONTROL CLEARANCES TO PERFORM THEIR RESPECTIVE OPERATIONS. IN THE AREA OF THE COLLISION, THE TAXIWAYS DID NOT HAVE SUFFICIENT SEPARATION FOR SIMULTANEOUS OPERATIONS OF WIDE-BODIED ACFT & STANDING PROCEDURES FOR GROUND CONTROLLERS PROHIBITED SUCH OPERATIONS. THE GROUND CONTROL POSITION WAS BEING WORKED BY A DEVELOPMENTAL CONTROLLER IN TRAINING UNDER SUPER- VISION OF A FULL PERFORMANCE CONTROLLER. THE ACFT BEING TOWED WAS BEING MOVED FROM GATE 75 WITH THE CALL SIGN 'UNITED 75 TOW.' THIS CALL SIGN WAS DERIVED BY USING THE COMPANY NAME (UNITED), THE GATE NUMBER (75), & THE WORD 'TOW.' WHILE IT WAS BEING TAXIED, UNITED FLT 75 OBTAINED CLEARANCE TO TAXI, BUT THE CONTROLLERS SAID THAT THEY DID NOT GET THE CALL SIGNS CONFUSED.
Full Narrative
DURING DARKNESS, A BOEING 747, N93106, WAS BEING TAXIED FOR DEPARTURE WHEN ITS LEFT WING COLLIDED WITH THE RIGHT WING OF A BOEING 767 BEING TOWED IN THE SAME DIRECTION ON A PARALLEL TAXIWAY. BOTH CREWS HAD OBTAINED GROUND CONTROL CLEARANCES TO PERFORM THEIR RESPECTIVE OPERATIONS. IN THE AREA OF THE COLLISION, THE TAXIWAYS DID NOT HAVE SUFFICIENT SEPARATION FOR SIMULTANEOUS OPERATIONS OF WIDE-BODIED ACFT & STANDING PROCEDURES FOR GROUND CONTROLLERS PROHIBITED SUCH OPERATIONS. THE GROUND CONTROL POSITION WAS BEING WORKED BY A DEVELOPMENTAL CONTROLLER IN TRAINING UNDER SUPER- VISION OF A FULL PERFORMANCE CONTROLLER. THE ACFT BEING TOWED WAS BEING MOVED FROM GATE 75 WITH THE CALL SIGN 'UNITED 75 TOW.' THIS CALL SIGN WAS DERIVED BY USING THE COMPANY NAME (UNITED), THE GATE NUMBER (75), & THE WORD 'TOW.' WHILE IT WAS BEING TAXIED, UNITED FLT 75 OBTAINED CLEARANCE TO TAXI, BUT THE CONTROLLERS SAID THAT THEY DID NOT GET THE CALL SIGNS CONFUSED.
Flight
Event TypeIncident
Event Time19:18 PST
Nearest AirportLos Angeles Intl (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing 747-131
Tail NumberN93106
Aircraft CategoryAir
DamageMinor
OperatorTrans World Airlines
Operating RulePart 121
Engines4
Engine TypeTurbofan
Engine DetailsP&W · JT9D · Turbofan · 45000
Seats453
People & Injuries
Injury SummaryNo injuries (365 uninjured)
Fatal0
Serious0
Minor0
Uninjured365
Total365
Crew 1Age 57 · First Class
Conditions
ConditionsVMC
LightDark Night
WindCalm
Visibility15 sm
CeilingNone
Temperature / Dew Point64 F / 52
Altimeter30.00 inHg
Observation Time03:18
Weather SourceWFAC