As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION COULD NOT BE MAINTAINED BELOW 10,000 FT CABIN ALTITUDE. EMERGENCY DECLARED, RETURNED & LANDED UNEVENTFULLY. CHECKED RT AIR CONDITIONING PACK & FOUND DUCTS LEAKING. TORQUED DUCT CLAMPS & PERFORMED CABIN LEAK DOWN TEST FROM 4.0 PSID WITH APU ONLY IAW FRM FIM 21-00-05-780-801. LEAK TESTED WITHIN LIMITS. ACFT OK FOR SERVICE.