What was found
AIRCRAFT FLYING AT 37,000 FEET. LOST PRESSURIZATION. MASK DROPPED AND AIRCRAFT DESCENDED. PASSENGERS WERE ON BOARD. AIRCRAFT INSPECTED BY MAINTENANCE PERSONNEL FROM A CESSNA SERVICE CENTER AND NO PROBLEM COULD BE FOUND. AIRCRAFT WAS FERRIED TO SERVICE CENTER. FOUND SEVERAL SMALL LEAKS AND A SMALL HOLE IN THE DOOR SEAL. SEALED THE LEAKS, REPLACED THE DOOR SEAL, AND BUILT THE DOOR FRAME UP TO GIVE THE SEAL A MORE POSITIVE SEAT.