As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE RIGGING THE PARKING BRAKE CABLE SMALL BALLS WERE FOUND AT THE BOTTOM OF THE COMPARTMENT HOUSING THE BRAKE CONTROL VALVE PN 600-88101-125. UPON FURTHER INVESTIGATION IT WAS DISCOVERED THAT THE TWO FOLLOWER BEARINGS FOR THE PILOT BRAKE PEDAL INPUT TO THE BRAKE CONTROL VALVE WERE DESTROYED. PART CYCLES, TSN AND TSO ARE UNKNOWN ON THE BEARINGS.