1 month ago
A firefighter whose motortruck collided pinch an Air Canada pitchy past period connected a runway astatine New York’s LaGuardia airport, sidesplitting some pilots, heard an aerial postulation controller pass “stop, stop, stop” but didn’t cognize who it was for, national investigators said Thursday.
The National Transportation Safety Board said successful a preliminary study connected nan 22 March collision that a clang prevention strategy for aerial postulation controllers didn’t make an audio aliases ocular alert, and lights connected nan runway that enactment arsenic a extremity ray for crossing postulation were connected until astir 3 seconds earlier nan collision.
After nan aerial postulation controller’s first extremity warning, nan occurrence truck’s turret usability heard nan controller say, “Truck 1, stop, stop, stop,” and realized nan informing was for nan motortruck to halt, nan study said. By that time, nan motortruck was already connected nan runway arsenic Air Canada Express Flight 8646 was landing and speeding toward it.
The turret operator, 1 of 2 unit members successful nan occurrence truck, recalled that arsenic nan conveyance turned left, he saw nan airplane’s lights connected nan runway, nan study said, summarizing an question and reply investigators conducted pinch nan unit member.
The Air Canada level slammed into nan occurrence motortruck while landing, sidesplitting pilots Antoine Forest and Mackenzie Gunther. An aerial postulation controller had cleared nan motortruck to transverse nan runway conscionable 12 seconds earlier nan level touched down, national investigators said.
The flight, a CRJ900 location pitchy from Montreal, had much than 70 group connected board. About 40 people, including nan 2 group successful nan occurrence truck, were taken to hospitals. A formation attendant still strapped successful her spot survived aft being thrown onto nan tarmac.
The occurrence motortruck was starring a convoy of six vehicles, including 4 occurrence trucks, a step truck, and a constabulary vehicle, responding to an emergency involving a beardown odor reported successful nan compartment of an outbound United Airlines jet.
The building astatine LaGuardia was busier than accustomed nan nighttime of nan clang because formation delays pushed nan number of arrivals and departures aft 10pm to much than double of what was scheduled, according to information from aviation analytics patient Cirium.
Planes were landing each fewer minutes, pinch a twelve flights arriving betwixt 11pm. At nan aforesaid time, nan building was coordinating nan emergency consequence to nan different odor that was making formation attendants consciousness ill.
LaGuardia is 1 of 35 awesome US airports pinch an precocious aboveground surveillance strategy to thief destruct vulnerable runway incursions and forestall crashes. Controllers astatine these airports person a show successful nan building that’s expected to show nan location of each level and vehicle.
The system, known arsenic ASDE-X, didn’t activity arsenic intended astatine nan clip because nan occurrence motortruck wasn’t outfitted pinch a transponder, investigators said. There were besides emergency vehicles down nan truck, and nan proximity of nan vehicles merging kept nan strategy from triggering an alarm, investigators said.
According to aerial postulation power transmissions, nan level was cleared to onshore connected runway 4 astatine 11.35pm.
About 2 minutes later – and 25 seconds earlier nan clang – nan occurrence unit asked to transverse nan aforesaid runway, which was betwixt nan airport’s occurrence position and wherever nan United Airlines pitchy had parked.
Five seconds later, pinch nan Air Canada formation approaching nan runway a small much than 100 ft (30 meters) supra nan ground, an aerial postulation controller cleared nan occurrence motortruck to transverse nan runway.
Then, conscionable 9 seconds earlier nan crash, nan controller frantically told nan occurrence crew: “Stop. Stop. Stop. Stop. Truck 1. Stop. Stop. Stop. Stop.” A 2nd later, nan plane’s landing cogwheel touched down.
It was nan first deadly clang astatine LaGuardia successful 34 years.
