Boeing has conceded that new software added to the MAX and called MCAS was involved in both crashes but questions have also been raised about the actions of the flight crews.
Last week, Boeing announced that it will cut production of 737s from 52 a month to 42 a month.
Regulators around the world grounded the plane last month after an Ethiopian Airlines Max crashed less than five months after a Lion Air Max plunged into the sea off the coast of Indonesia.
The household a Minnesota man who died when an Ethiopian Airlines airplane crashed last month has filed a wrongful death lawsuit against Boeing, the maker of the 737 Max aircraft which was included in the wreck and is now being investigated by US prosecutors.
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Goldman Sachs said it does not expect Boeing to deliver any MAXs in the second quarter and said it was hard to expect MAX orders at the upcoming Paris Air Show in June.
Many analysts believe the deliveries will only be delayed, not lost forever, unless airlines cancel orders for the plane. Boeing hasn't described the second issue but says it is not related to the anti-stall system.
The Chinese carrier expects the investigation of the Boeing 737 MAX to be finalized soon.
"We are in close communications with Boeing, and there is no change on the orders for the moment".
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Kevin McAleenan , the current US Customs and Border Protection commissioner, will serve as her temporary replacement. Her departure provides political fodder but little comfort, given Trump's demands for ever more severe policies.
The backlog of MAX 8 orders is still 4,600-long, according to the Seattle Times. But Delta CEO Ed Bastian said he remains confident in Boeing's technological prowess and is interested if Boeing decides to build a new plane bigger than the 737.
Boeing acknowledged that the sensor malfunctioned and Muilenburg said last week that a new software update would prevent future incidents.
Airlines that own the Max, however, are paying a price.
American Airlines also said that it was unable to forecast how much the disruption would cost the company.
American cancels more flights amid Boeing 737 Max grounding
It is one of a growing number of claims against the company in the wake of two deadly crashes involving the 737 Max . The airline acknowledged in a statement that the prolonged cancellations could bring disruption for some travelers.
The MAX grounding caused 1,200 American flight cancellations during the first quarter, in addition to 940 cancellations due to American's decision to remove 14 737-800 aircraft from service after pilots complained that overhead bins were not closing on some recently retrofitted cabins.