What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilots required to perform one takeoff at max takeoff power and record parameters. After takeoff number 4 engine fire switch illuminated, bell sounded, and nacelle indicators read approximately 9.5 on a and b loops. Engine was shutdown per emergency checklist. No. 4 thrust lever would not move forward. Icing light illuminated. Number 4 engine left and right fire bottles discharged lights failed to illuminate after discharge button pressed. Bottles verified with squib test at fe panel.
As the FAA filed it
(-23) PILOTS REQUIRED TO PERFORM ONE TAKEOFF AT MAX TAKEOFF POWER AND RECORD PARAMETERS. AFTER TAKEOFF NUMBER 4 ENGINE FIRE SWITCH ILLUMINATED, BELL SOUNDED, AND NACELLE INDICATORS READ APPROXIMATELY 9.5 ON A AND B LOOPS. ENGINE WAS SHUTDOWN PER EMERGENCY CHECKLIST. NO. 4 THRUST LEVER WOULD NOT MOVE FORWARD. ICING LIGHT ILLUMINATED. NUMBER 4 ENGINE LEFT AND RIGHT FIRE BOTTLES DISCHARGED LIGHTS FAILED TO ILLUMINATE AFTER DISCHARGE BUTTON PRESSED. BOTTLES VERIFIED WITH SQUIB TEST AT FE PANEL.