What was found
AIRCRAFT WAS GROUNDED. EXPERIENCED GEAR RELATED VIBRATION ABOVE 100 KTS ON T/O AND LANDING. UPON TAXI IN, EXPERIENCED SECOND LEFT MAIN FAILURE-BOTH LEFT GEAR TIRES FLAT REPORTED BY ANOTHER A/C. FLIGHT CREW ALSO REPORTED APROXIMATLEY 30 MINUTES AFTER SITTING WITH THE LEFT MAIN GEAR TIRES FLAT THEY EXPERIENCED A LOSS OF HYDRAULIC QUANTITY ON THE LEFT HAND SIDE. MAINTENANCE MAIN FOUND THE HYDRAULIC LINE TO THE LEFT GEAR SHIMMY DAMPER SEVERED. MAINTENANCE REPLACED THE SEVERED HYDRAULIC LINE, BLED THE SHIMMY DAMPER AND ACCOMPLISHED A SATISFACTORY LEAK CHECK, PER AMM 32-11-81. (AALA202011129022) IN ADDITION, LEFT HAND MAIN LANDING GEAR NR 1 (AALA202011019005) AND NR 2 (AALA202011129021) TIRES WERE REPLACED, PER AMM 32-45-11.