"American Airlines" said that it is currently canceling about 90 miles of Boeing 737 MAX flights. The American Airlines fleet has 24 737MAXs and is the second largest 737 MAX operator in China, with only 34 of Southwest Airlines.
"American Airlines" said that the extended grounding was to "provide more certainty to customers and teams, so that customers can be more secure and can take other flights to their destinations."
Boeing is expected to officially disclose the automatic anti-stall system update to the Federal Aviation Administration (FAA) on the 25th. In October last year, Lion Air in Indonesia was unable to come to Boeing to update the automatic anti-stall system, but it still needs to be approved by the regulatory authorities.