As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX AIRCRAFT WOULD NOT PRESSURIZE. FLIGHT RETURNED PDX LANDED WITHOUT INCIDENT. RE-SECURED CLAMP FOR DUCT TO RT HAND AIR CYCLE MACHINE. ACCOMPLISHED DEFERRAL OF RT HAND AIR CONDITIONING PACK SYSTEM IAW MEL. FLIGHT CONTINUED TO DESTINATION. REPLACED TEMPERATURE CONTROL VALVE AT RT HAND AIR CONDITIONING PACK AT ORD ON 10/18/2013. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSE.