As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN BRAKING, FEELING AN HEARING ABRUPT GRINDING VIBRATION FEELING AS IF ON GRAVEL. REMOVED WORN LH BRAKE AND INSTALLED OVERHAULED BRAKE ASSEMBLY IAW AMM 32-45-21. SERVICED MAIN HYDRAULIC SYSTEM WITH 1QT FLUID 881 IAW AMM 12-13-00. LEAK AND OPS CHECKS GOOD. NO FURTHER ACTION REQUIRED AT THIS TIME.