What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Taxiing into takeoff position, air Wisconsin flt 3647, while at phl, encountered an APU fire warning light. The crew shut off the APU, left the runway. After completing the qrh fire procedure, the fire light extinguished. Tower alerted the crash rescue crew who after arriving at the scene, recommended evacuation. Halon was sprayed into the engine by the fire fighting personnel. Evacuation details iaw hb 8020.11B: 1. Reason for evacuation - APU fire. 2. Initiated by flight crew. 3. Main exit used - (CL-65 does not have sides). 4. Malfunctioning doors slider - n/a. 5. Main exit used by all. 6. Estimated evacuation - 80 seconds. 7. No injuries.
As the FAA filed it
(-23) TAXIING INTO TAKEOFF POSITION, AIR WISCONSIN FLT 3647, WHILE AT PHL, ENCOUNTERED AN APU FIRE WARNING LIGHT. THE CREW SHUT OFF THE APU, LEFT THE RUNWAY. AFTER COMPLETING THE QRH FIRE PROCEDURE, THE FIRE LIGHT EXTINGUISHED. TOWER ALERTED THE CRASH RESCUE CREW WHO AFTER ARRIVING AT THE SCENE, RECOMMENDED EVACUATION. HALON WAS SPRAYED INTO THE ENGINE BY THE FIRE FIGHTING PERSONNEL. EVACUATION DETAILS IAW HB 8020.11B: 1. REASON FOR EVACUATION - APU FIRE. 2. INITIATED BY FLIGHT CREW. 3. MAIN EXIT USED - (CL-65 DOES NOT HAVE SIDES). 4. MALFUNCTIONING DOORS SLIDER - N/A. 5. MAIN EXIT USED BY ALL. 6. ESTIMATED EVACUATION - 80 SECONDS. 7. NO INJURIES.