As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKES GRAB & CHATTER AND GROAN WHEN COMING TO A STOP. ALSO LEFT BRAKE PEDAL FEELS MUSHY UPON APPLICATION. WORK WITH TSM 32-42-00-810-912A. POSSIBLE LOW PRESSURE BRAKE ALTERNATE BRAKE SERVICE+BLEED NEEDED. BLED LOW PRESSURE CTRL SYSTEM OF ALTERNATE BRAKING AND REPLACED BRAKES NR 2, 3 AND 4. TAXIED AIRCRAFT, BRAKES OPERATED NORMAL.