(CBS News) —The Federal Aviation Administration (FAA) has discovered a new flaw in Boeing’s 737 Max that could further delay its return to the skies. All 737 Max models were grounded after two crashes overseas that killed 346 people.

During flight tests in a Boeing 737 Max simulator in Seattle, FAA test pilots discovered a computer issue that could slow down a pilot’s ability to quickly respond to a scenario like the ones seen in the two Max crashes.

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