Boeing disclosed 737 Max safety issue 'after' Lion Air crash: Southwest

The revelation raises new questions about Boeing's best-selling jet as the company works to convince airlines and regulators that the Max will be safe once a software update is installed

Southwest Airlines Co. first learned from Boeing Co. after a deadly Lion Air crash in October that an alert warning pilots of a sensor malfunction linked to the disaster wasn’t a standard feature on the 737 Max.

The world’s largest 737 operator and its pilots had thought that the warning light worked on all Max jets, as it had on the previous generation of 737 aircraft, Southwest said Sunday. The airline only learned after the accident that on the Max, the feature was connected to a separate indicator display -- available for a fee -- that provides readings from the plane’s