The president of the pilots' union at American Airlines has said Boeing's zeal to minimize pilot-training costs for airlines that would buy the 737 Max jet contributed to design errors and inadequate training. That has left a "crisis of trust" around aviation safety, he said. Boeing engineers have finished making fixes to the software and expect to soon demonstrate its work to government safety officials on test flights in hopes that the FAA will certify the plane model as safe. The changes will be accompanied by additional pilot training.