Accident
Last updated: 1 October 2014
Statuts:Enquête Officielle
Date:vendredi 1 février 1991
Heure:18:07
Type/Sous-type:Silhouette image of generic B733 model; specific model in this crash may look slightly different
Boeing 737-3B7
Compagnie:USAir
Immatriculation: N388US
Numéro de série: 23310/1145
Année de Fabrication: 1985-08-23 (5 years 5 months)
Moteurs: 2 CFMI CFM56-3B1
Equipage:victimes: 2 / à bord: 6
Passagers:victimes: 20 / à bord: 83
Total:victimes: 22 / à bord: 89
Victime de la collision:victimes: 12
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Los Angeles International Airport, CA (LAX) (   Etats-Unis d'Amérique) show on map
Élévation des lieux de l'accident: 38 m (125 feet) amsl
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Nat.
Aéroport de départ:Columbus-Port Columbus International Airport, OH (CMH/KCMH), Etats-Unis d'Amérique
Aéroport de destination:Los Angeles International Airport, CA (LAX/KLAX), Etats-Unis d'Amérique
Numéro de vol:1493
Détails:
USAir Flight 1493 left Columbus at 13:17 for a flight to Los Angeles. The Boeing 737 aircraft entered LAX airspace around 17:57 and was cleared for a CIVET Two Profile Descent and ILS runway 24R approach. At 17:59 this was changed to a runway 24L approach clearance.
At about the same time a SkyWest Metro II aircraft (Flight 5569 to Palmdale) taxied out from Terminal 6, Gate 32 to runway 24L. At 18:03 the crew were advised to "taxi up to and hold short of 24L" because of other traffic. At 18:04:49 the flight was cleared to taxi into position and hold. Immediately thereafter the controller became preoccupied with instructing WingsWest Flight 5006 who had unintentionally departed the tower frequency. The WingsWest 5072 reporting ready for takeoff caused some confusion because the controller didn't have a flight progress strip in front of her. The strip appeared to have been misfiled at the clearance delivery position. Meanwhile, Flight 5569 was still on the runway at the intersection with taxiway 45, awaiting takeoff clearance.
At 18:07 Flight 1493 touched down. Simultaneous to the nosegear touchdown, the Boeing 737 collided with the SkyWest Metro. Both aircraft caught fire and slid to the left into an unoccupied fire station.


PROBABLE CAUSE: "The failure of the Los Angeles Air Traffic Facility Management to implement procedures that provided redundancy comparable to the requirements contained in the National Operational Position Standards and the failure of the FAA ATS to provide adequate policy direction and oversight to its ATC facility managers. These failures created an environment in the Los Angeles ATC tower that ultimately led to the failure of the Local Controller 2 (LC2) to maintain awareness of the traffic situation, culminating in the inappropriate clearances and the subsequent collision of the USAir and SkyWest aircraft. Contributing to the cause pf the accident was the failure of the FAA to provide effective quality assurance pf the ATC system."

Sources:
» NTSB/AAR-91/08

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-91-08
report released:22-OCT-1991
duration of investigation:263 days (8.8 months)
download report: Runway Collision of USAIR Flight 1493, Boeing 737 and Skywest Flight 5569 Fairchild Metroliner, Los Angeles, California, February 1, 1991. (NTSB/AAR-91-08)
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Opérations de secours

NTSB issued 18 Safety Recommendations

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Photos

photo of Boeing 737-3B7 N388US
photo of Boeing 737-3B7 N388US
Seating and injuries chart
photo of Boeing 737-3B7 N388US
Wreckage diagram
photo of Boeing 737-3B7 N388US
Airport map
photo of Boeing 737-3B7 N388US
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Columbus-Port Columbus International Airport, OH et Los Angeles International Airport, CA est de 3182 km (1989 miles).

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