What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Pilot stated that during maintenance event involving the dynamic balance and tracking of the main rotor blades, he removed the left seat collective and cyclic controls to facilitate the mechanic's use of a chadwick dynamic balancing computer. After removing the collective and cyclic controls the pilot failed to install a small cubical cover which simply snaps into place to prevent this type of mishap. After many hovering and forward flight evolutions the balance and tracking of the rotor blades was complete. The mechanic placed the chadwick computer on the cockpit floor directly behind his legs. The pilot and mechanic again lifted into a hover to taxi back to the hangar. During this initial lifting into the hover the chadwick computer and associated cables became entangled with the cyclic control mount which jammed the cyclic control preventing the pilot from exercising control of the aircraft. When the cyclic control jammed the aircraft rolled to the left landing hard on the left skid breaking it into several pieces. During this event the aircraft sustained substantial damage.
As the FAA filed it
(-23) PILOT STATED THAT DURING MAINTENANCE EVENT INVOLVING THE DYNAMIC BALANCE AND TRACKING OF THE MAIN ROTOR BLADES, HE REMOVED THE LEFT SEAT COLLECTIVE AND CYCLIC CONTROLS TO FACILITATE THE MECHANIC'S USE OF A CHADWICK DYNAMIC BALANCING COMPUTER. AFTER REMOVING THE COLLECTIVE AND CYCLIC CONTROLS THE PILOT FAILED TO INSTALL A SMALL CUBICAL COVER WHICH SIMPLY SNAPS INTO PLACE TO PREVENT THIS TYPE OF MISHAP. AFTER MANY HOVERING AND FORWARD FLIGHT EVOLUTIONS THE BALANCE AND TRACKING OF THE ROTOR BLADES WAS COMPLETE. THE MECHANIC PLACED THE CHADWICK COMPUTER ON THE COCKPIT FLOOR DIRECTLY BEHIND HIS LEGS. THE PILOT AND MECHANIC AGAIN LIFTED INTO A HOVER TO TAXI BACK TO THE HANGAR. DURING THIS INITIAL LIFTING INTO THE HOVER THE CHADWICK COMPUTER AND ASSOCIATED CABLES BECAME ENTANGLED WITH THE CYCLIC CONTROL MOUNT WHICH JAMMED THE CYCLIC CONTROL PREVENTING THE PILOT FROM EXERCISING CONTROL OF THE AIRCRAFT. WHEN THE CYCLIC CONTROL JAMMED THE AIRCRAFT ROLLED TO THE LEFT LANDING HARD ON THE LEFT SKID BREAKING IT INTO SEVERAL PIECES. DURING THIS EVENT THE AIRCRAFT SUSTAINED SUBSTANTIAL DAMAGE.