What was found
CREW RECOGNIZED A PRESSURIZATION PROBLEM EARLY, CALLED FOR CHECKLIST FOR CABIN PRESSURE TO HIGH. INITIATED DESCENT, DECLARED EMERGENCY AND DIVERTED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE WAS SENT TO WORK THE PROBLEM. PERFORMED A VISUAL INSPECTION OF AIRCRAFT ACCESSORY COMPARTMENT, NR 1 & NR 2 ENGINES AND WATER SEPARATOR. NO DEFECTS WERE FOUND. COMPLIED WITH A LEAK CHECK OF THE WATER SEPARATOR AND AFT ACCESSORY COMPARTMENT. NO LEAKS WERE NOTED IAW MM 21-20-1. COMPLIED WITH PRESSURIZATION, OPS CHECK IN MANUAL AND AUTO MODE IAW MM 21-30-5. THE OPS CHECK WAS GOOD WITH NO DEFECTS NOTED. ACFT WAS RETURNED TO SERVICE.