What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)This FAR 121 flight was to be operated as united express (air Wisconsin) 5626. During start of hte #2 engine (inboard on the left wing) a torching effect occurred from the tailpipe, which passengers and flight attendants took to be a serious engine fire. The pilots had no cockpit indication of a fire. Nevertheless, an evacuation was ordered from the right side of the aircraft, which was accomplished without injuries of further incident. The pilots shut down the #1 and #2 engines, and supervised the evacuation. No evidence of fire outside of the tailpipe was found. The engine was removed and torn down, but the exact cause of the torching remains undetermined.
As the FAA filed it
(-23)THIS FAR 121 FLIGHT WAS TO BE OPERATED AS UNITED EXPRESS (AIR WISCONSIN) 5626. DURING START OF HTE #2 ENGINE (INBOARD ON THE LEFT WING) A TORCHING EFFECT OCCURRED FROM THE TAILPIPE, WHICH PASSENGERS AND FLIGHT ATTENDANTS TOOK TO BE A SERIOUS ENGINE FIRE. THE PILOTS HAD NO COCKPIT INDICATION OF A FIRE. NEVERTHELESS, AN EVACUATION WAS ORDERED FROM THE RIGHT SIDE OF THE AIRCRAFT, WHICH WAS ACCOMPLISHED WITHOUT INJURIES OF FURTHER INCIDENT. THE PILOTS SHUT DOWN THE #1 AND #2 ENGINES, AND SUPERVISED THE EVACUATION. NO EVIDENCE OF FIRE OUTSIDE OF THE TAILPIPE WAS FOUND. THE ENGINE WAS REMOVED AND TORN DOWN, BUT THE EXACT CAUSE OF THE TORCHING REMAINS UNDETERMINED.