A Critical Mistake
Unbeknownst to Keighley—because he had no idea what he was doing and shouldn't have been put in this situation in the first place—he made a deadly mistake. He had flipped the wing flaps down instead of up. This caused the plane to nosedive right about the top of flight 548's descent.
Key to the Rescue
This nosedive caused one of the plane's engines to stall. Fortunately, Key was able to recover and pull the plane back up to ascension. However, Key started feeling a wild tightness in his chest. Suddenly, his entire view of the cockpit started to narrow. He slipped out of his chair onto the carpet, completely unconscious...