Boeing is upgrading the stall prevention software on its 737 MAX, industry sources said Friday, as French investigators scoured black box data from the latest of two deadly crashes involving the aircraft in recent months. The MAX has been grounded worldwide following Sunday’s Ethiopia Airlines disaster that killed all 157 on board, and the fallout has left the company, regulators and airlines scrambling to respond. Boeing will fine-tune its MCAS system — implicated in the crash of a Lion Air 737 MAX 8 in Indonesia in October — within 10 days, said two sources, who cautioned that the cause of the latest crash has yet to be determined.
