What was found
CREW VERBAL REPORT OF POOR AIR QUALITY IN FIRST CLASS CABIN. AIRCRAFT DIVERTED INTO DEN WITH 3 ILL FLIGHT ATTENDANTS COMPLAINING OF BREATHING DIFF. ALL LOCATED IN FIRST GALLEY. *S/D* PER VERBAL FROM CABIN CREW, ACTUAL PROBLEM WAS IN LOWER GALLEY. SEVERAL LOWER GALLEY VENTILATION CHECKS WERE DONE WITH NOTHING FOUND. THERE HAS BEEN NO SUBSEQUENT INFLIGHT PROBLEMS, HOWEVER THE INVESTIGATION IS CONTINUING AND MORE RIGOROUS LOWER GALLEY VENTILATION CHECKS ARE PLANNED. 6/23: FOLLOW-UP; VENTILATION CHECK WAS ACCOMPLISHED AND NO DEFECTS WERE NOTED.