As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: LOUD SQUEALING IN BRAKES AT LOW SPEEDS. VIBRATIONS FELT IN BRAKEPEDALS AND SEEMS LIKE MAYBE A STUCK PAD OR BRAKE. FLIGHT ATTANDENT ALSO REPROTED LOUD GRINDING SOUND FROM BACK OF PLANE AND SOUNDS LIKE A FREIGHT TRAIN. TROUBLESHOOT AND FOUND FRONT LEFT HAND OUTBOARD ANTI-SKID CONTROL VALVE BAD. REMOVED AND REPLACED, OPERATIONAL CHECK GOOD. PER WORKCARD 08L70032008.