As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BLOCK, BOTH ENGINES OFF & PARKING BRAKE SET. AIRCRAFT ROLLED BACK. APPLIED BRAKES. RESET PARKING BRAKE BUT IT FEELS LIKE IT IS NOT ENGAGING. REMOVED AND REPLACED AFT CABLE TO PARKING BRAKE CONTROL HANDLE IAW AMM 32-45-11-04. NORMAL BRAKING AND PARKING, ULTIMATE EMERGENCY BRAKE OPERATIONAL TESTED GOOD. ACFT OK FOR SERVICE.