Boeing expresses regret over ex-pilot's 737 MAX messages, faults simulator

SEATTLE/WASHINGTON (Reuters) - Boeing Co said on Sunday it understood the outcry over leaked messages from a former test pilot over erratic software behavior on its 737 MAX jet two years before recent crashes, and added it was still investigating what they meant.The world's largest planemaker, under growing pressure to explain what it knew about 737 MAX problems before it entered service, said it had not been able to speak directly to former employee Mark Forkner but echoed his lawyer's subseque