KEY POINTS
  • American Airlines has taken the Boeing 737 Max out of its schedule through Sept. 3, later than the previously planned Aug. 19.
  • The planes were grounded worldwide in mid-March following two fatal crashes.
  • Boeing has finished a software patch for the planes but aviation officials haven't signed off on it yet.

American Airlines said Sunday that it is removing the Boeing 737 Max from its schedules through Sept. 3, a sign that the planes' grounding will disrupt travel longer than expected.