What was found
WHEN MLG BRAKES ARE APPLIED, A VERY LOUD GRIND/GROAN IS FELT AND HEARD THROUGHT AIRFRAME. WHEN BRAKES WERE APPLIED FOR LANDING, RT BRAKE WAS MUSHY AS COMPARED TO LT BRAKE. REMOVED RT MLG WHEELS AND CLEANED BOTH RT BRAKES AND BLED RT BRAKE SYS IAW MM 32-42-00 AND 32-41-02. PERFORMED OPS & LEAK CHECKS, BRAKES OPS NORMAL, NO NOISE FROM BRAKES AT THIS TIME.