4:50 p.m. Update:
American Airlines reports that as of 4:30 p.m., its systems have been fully restored. But the airline warned in a Facebook note that they expected delays and cancellations to continue for the remainder of the day.
American Airlines has grounded all of its flights until at least 5 p.m. due to an issue involving its reservation system:
UPDATE: We are now in a system-wide ground delay until 4:00pm CT as we work to resolve this issue. We apologize for any inconvenience.
— American Airlines (@AmericanAir) April 16, 2013
The airline’s site says that its “reservation system is experiencing intermittent outages.” Until this is resolved, expect all American Airlines flights to stay on the ground.