American Airlines said in a statement that it remained "confident" that software updates to the 737 MAX, along with Boeing's proposed training developments with union partners, would "lead to recertification of the aircraft this year", APA reports citing Sputnik.
The announcement comes after the troubled plane's grounding across the world due to two aviation disasters involving a Lion Air flight in Indonesia last October and Ethiopian Airlines flight in March, killing 348 passengers.
American Airlines added that it was in "continuous contact" with the Federal Aviation Administration (FAA), the Department of Transportation (DOT), National Transportation safety Board (NTSB) and others.
American Airlines said: "American is extending cancellations for the MAX through Dec. 3. By doing so, our customers and team members can more reliably plan their upcoming travel on American. In total, approximately 140 flights per day will be canceled through Dec. 3. Our Reservations and Sales teams will continue to work closely with customers who are impacted by these cancellations.
American Airlines has been forced to cancel roughly 140 flights per day and reimburse or reschedule flights for its passengers, and joined United Airlines in efforts to block to plane's return to service after the latter announced it would not use the aircraft until 19 December. The US's third-largest carrier, Southwest Airlines, also said that it would ground all of its 737 MAX 8s through 2020.