"Doing so would preserve the handshake agreement and special relationship with Boeing, the value of its existing MAX 8 aircraft, and the value of its massive order for additional MAX 8 aircraft".
American Airlines, which has already pulled the Max off its flying schedule through September 3, had in April cut its annual profit forecast, blaming an estimated US$350-million hit from the groundings.
While the 737 remains the most delivered aircraft this year to date, in the second quarter there were only 24 deliveries of the type, versus 42 Dreamliners that now dominate the chart.
It's a potentially troubling sign for Boeing, which has not seen customers divert orders to Airbus en masse.
Airbus is on track to overtake Boeing as the world's biggest planemaker as the U.S. company reported a slump in deliveries of new commercial jetliner deliveries following two fatal crashes involving the 737 Max.
According to the suit, the 11 plaintiffs bought Southwest tickets between August 29, 2017, when the airline received its first Boeing 737 Max, and March 13, when the FAA grounded all of the jets.
On Monday, Saudi Arabian budget carrier Flyadeal canceled an order of 50 Boeing 737 Max jets worth up to $5.9 billion in favor of a deal with Airbus. The company reported orders for just 13 commercial jets last quarter. Boeing suspended Max deliveries in March but continues to ship an older 737 model called the NG.
Indian aviation authorities prohibited the operation of these planes over Indian airspace on March 13.
Morningstar analyst Danny Goode said he does not expect other carriers to follow flyadeal as long as Boeing is able to ensure reentry of the 737 MAX by the end of the year.
Pilots with the Federal Aviation Administration discovered a new flaw last month while testing updated software in a flight simulator, pushed back Boeing's timetable.
Dozens of lawsuits have been filed by families of those aboard the downed planes, and last week Boeing said it will make an initial investment of $100 million over several years to help families and communities affected by the two crashes.
The second quarter was particularly slow for the plane maker in terms of new business gained - orders.