What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Spirit flight 417 conducted a normal takeoff from runway 22L at dtw. Following lift off and while turning to the tower assigned heading, the crew was advised by the tower controller that they had lost an engine panel. The crew received no warnings in the cockpit and the engine performed normally. The flight crew assessed the situation and received notification from the cabin by a deadheading flight crewmember that the left engine outboard engine cowling was missing. An emergency landing was declared by the tower controller to provide the flight priority handling and the flight returned to dtw and landed uneventfully. All of the major pieces of the cowling were recovered from the runway by the dtw fire and rescue unit and returned to the spirit airlines maintenance hangar where the aircraft was located when the FAA inspectors (who had been notified of the occurrence) arrived at the scene. An investigation is being conducted by dtw-fsdo inspectors to determine the cause as to why the engine cowling departed the aircraft after liftoff.
As the FAA filed it
(-23) SPIRIT FLIGHT 417 CONDUCTED A NORMAL TAKEOFF FROM RUNWAY 22L AT DTW. FOLLOWING LIFT OFF AND WHILE TURNING TO THE TOWER ASSIGNED HEADING, THE CREW WAS ADVISED BY THE TOWER CONTROLLER THAT THEY HAD LOST AN ENGINE PANEL. THE CREW RECEIVED NO WARNINGS IN THE COCKPIT AND THE ENGINE PERFORMED NORMALLY. THE FLIGHT CREW ASSESSED THE SITUATION AND RECEIVED NOTIFICATION FROM THE CABIN BY A DEADHEADING FLIGHT CREWMEMBER THAT THE LEFT ENGINE OUTBOARD ENGINE COWLING WAS MISSING. AN EMERGENCY LANDING WAS DECLARED BY THE TOWER CONTROLLER TO PROVIDE THE FLIGHT PRIORITY HANDLING AND THE FLIGHT RETURNED TO DTW AND LANDED UNEVENTFULLY. ALL OF THE MAJOR PIECES OF THE COWLING WERE RECOVERED FROM THE RUNWAY BY THE DTW FIRE AND RESCUE UNIT AND RETURNED TO THE SPIRIT AIRLINES MAINTENANCE HANGAR WHERE THE AIRCRAFT WAS LOCATED WHEN THE FAA INSPECTORS (WHO HAD BEEN NOTIFIED OF THE OCCURRENCE) ARRIVED AT THE SCENE. AN INVESTIGATION IS BEING CONDUCTED BY DTW-FSDO INSPECTORS TO DETERMINE THE CAUSE AS TO WHY THE ENGINE COWLING DEPARTED THE AIRCRAFT AFTER LIFTOFF.