As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOOR AREA IN ROW 22 - 24 RT SIDE VIBRATES. TURNED OFF LOWER RECIRCULATING FAN & ACCOMPLISHED VISUAL INSPECTION AT RT AC BAY PACK COMPONENTS INCLUDING ALL SUPPORTS BRACKETS, RAM AIR INLET IAW AMM 21-52-20-401, MT21-UA7 & AT FWD BULK PIT AFT WALL AIR PLENUM, RECIRCULATING FAN & SURROUNDING STRUCTURES, NO DEFECTS NOTED. CHECKED SEAT ROWS 22 - 24 AT RT SIDE FOR SECURITY AT FLOOR ATTACHMENTS.