A computer glitch in the reservations system at American Airlines caused all of the carrier's flights to be grounded for at least two hours on Tuesday.
"American's reservation and booking tool, Sabre is offline," American Airlines spokeswoman Mary Frances Fagan told Reuters in an email. "We're working to resolve the issue as quickly as we can. We apologize to our customers for any inconvenience."
NPR's Wade Goodwyn reports that the outage was announced about 2:30 p.m. Eastern time.
Federal aviation officials have ordered that more than 1,000 Boeing 737s be examined to see if a key part on the plane's tail section needs to be replaced, The Wall Street Journal reported Monday.
The Federal Aviation Administration issued the airworthiness directive for a pin that holds the 737's horizontal stabilizer to the rest of the tail, to see if it is in danger of failing prematurely. The horizontal stabilizer — also known as the tail plane — enables the pilot to control the aircraft's pitch.
More than 100 passengers survived a crash into the sea, after the Boeing 737 they were traveling on from West Java to Bali, Indonesia, missed the runway at Denpasar International Airport. The plane came to rest in shallow waters, simplifying rescue efforts. Photographs showed the Lion Air jet in the water, its fuselage broken just behind its wings.
The aircraft was carrying 101 passengers and seven crew members when it crashed; afterward, rescue workers used rubber boats to get people off the plane.