What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
While starting to taxi onto runway 15 from the hold short line at Charleston afb/intl (chs) for takeoff, the aircraft turned to the left, and the aircraft ran off the end of the runway hitting the runway end lights. The pilot stated that that he pressed the right rudder and right brake with no result. The pilot also stated that at this point he pressed the top of both rudder pedals with all his strength with no result. At this point the pilot stated that he pulled the power to idle and pulled the parking brake to the on position.
As the FAA filed it
WHILE STARTING TO TAXI ONTO RUNWAY 15 FROM THE HOLD SHORT LINE AT CHARLESTON AFB/INTL (CHS) FOR TAKEOFF, THE AIRCRAFT TURNED TO THE LEFT, AND THE AIRCRAFT RAN OFF THE END OF THE RUNWAY HITTING THE RUNWAY END LIGHTS. THE PILOT STATED THAT THAT HE PRESSED THE RIGHT RUDDER AND RIGHT BRAKE WITH NO RESULT. THE PILOT ALSO STATED THAT AT THIS POINT HE PRESSED THE TOP OF BOTH RUDDER PEDALS WITH ALL HIS STRENGTH WITH NO RESULT. AT THIS POINT THE PILOT STATED THAT HE PULLED THE POWER TO IDLE AND PULLED THE PARKING BRAKE TO THE ON POSITION.