As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD WHINNING SOUND STILL UNDER FLOORBOARD NEAR 3R. PER INBD CREW COMMENT: FLOOR VIBRATION AND NOISE BETWEEN DOORS 3R AND 3L, FROM 3 ROWS FWD OF DOORS TO 5 ROWS BACK. INSPECTED ALL DUCTS IN AFT PIT AND WHEEL WELLS. FOUND ADP AIR DUCT CLAMP DETERIORATED AT LT WHEEL WELL (AFT FIRE WALL). REPLACED CLAMP.