As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT THRU 18000 FT, HEARD 2 LOUD BANGS FOLLOWED BY VIBRATION FELT BY THE CREW. THE VIBRATION WAS CENTER IN THE FLOOR AREA OF THE COCKPIT. COMPLIED WITH 750 GEAR BUMP TROUBLESHOOTING INSTRUCTION IAW 750 MM 32-30-00. COMPLIED WITH SB750-32-47. REMOVED AND REPLACED MLG CONTROL MANIFOLD ASSY IAW SB750-32-47. LEAK AND OPS CHECK GOOD.