What was found
VIBRATION FELT BY F/A IN AFT GALLEY WHILE CLIMBING THRU FL 240. VIBRATION FELT IN FLOOR FROM GALLEY UP TO WINGS AS WELL AS IN FIRST CLASS . DID NOT FEEL IN FLIGHT DECK OR CONTROLS. VIBRATION WENT AWAY DESCENDING THRU 10,000 FT AND SLOWING FROM 250 TO 210 CREW STATED APU WAS OFF ENTIRE FLIGHT FOUND LAV SERVICE DOOR LOOSE, REMOVED AND REPLACED LATCHES AND ADJUSTED DOOR PER MM 52-49-07.ALSO FOUND BELLY PANEL 193B LOOSE JUST FWD OF THE WHEEL WELLS. SECURED PANEL 193B. NO OTHER DEFECTS NOTED.