What was found
CREW REPORTED-PASSENGER DESCRIBED A WHOMPING SOUND FOLLOWED BY A “BUCKET DRAGGING ACROSS THE PLANE”. NO EICAS INDICATIONS SHOWN OR ANYTHING ABNORMAL FROM THE FLIGHT DECK. THE SOUND FROM THE FLIGHT DECK SOUNDED LIKE A LOW RUMBLE. CORR ACTION- MX PERFORMED GVI OF INTERIOR AND EXTERIOR OF A/C, OPERATED PACKS AND PRESSURED CABIN AND COULD IDENTIFY NO ABNORMAL SOUNDS OR RUMBLING AT THIS TIME. SUSPECT IT WAS ICE COMING OFF THE AIRCRAFT.