Robert Evans had initially responded to the abnormal indications. He had directed Mark to monitor the aircraft’s performance while he worked through the appropriate checklist.
Then the captain’s condition deteriorated.
His speech became confused.
He struggled to complete a sentence.
Within moments, he slumped back in his seat, no longer able to perform his duties.
Mark called for assistance from the cabin crew and followed the aircraft’s emergency procedures as best he could.
He had an aircraft to fly, an engine problem to manage, and an incapacitated captain beside him.
