Dozens of commercial aircraft were left virtually flying blind after a Monday outage at Denver airport’s air traffic control left pilots unable to communicate with controllers for 90 seconds.
The incident occurred Monday afternoon at the Denver Air Route Traffic Control Center in Longmont, which oversees aircraft movement across nine states.
Between 15 and 20 commercial aircraft approaching Denver International Airport lost all communication with controllers when multiple radio transmitters failed.
While initial reports indicated an outage of up to six minutes, the FAA has since clarified that the outage was approximately 90 seconds, and that it is “investigating” the cause.
According to ABC7, controllers were already operating on a backup fifth frequency when the system crashed, as four of the other frequencies had already crashed.
When the final frequency went down, a controller…
