FAA lost phone , radar service ; serviced restored at 3 p.m . ET Tuesday . A spokeswoman for Delta Air Lines said it canceled six flights and rerouted several others as a result of the incident . Air controllers could not communicate to hand off control of flights , FAA said . Comment: The planes weren't flying in the air but on a runway that was being used by another plane and they had no way of knowing which one it was until after takeoffs or landings FedEx , based in Memphis , diverted its aircraft to other cities , spokesman said .
FAA lost phone , radar service ; serviced restored at 3 p.m . ET Tuesday . Air controllers could not communicate to hand off control of flights , FAA said . Comment: The planes weren't flying in the air but on a runway that was being used by another plane and they had no way of knowing which one it was until after takeoffs or landings FedEx , based in Memphis , diverted its aircraft to other cities , spokesman said .