As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT FAILED TO PRESSURIZE AFTER TAKEOFF OTU OF PIE, AIRCRAFT RETURNED TO PIE AND LANDED WITHOUT INCIDENT. CLEANED CONNECTOR AT AIR CONDITIONER PACK VALVE AND OVERTEMP SWITCHES AND CONTROL PANEL, RIGHT PACK NORMAL AIRCRAFT PRESSURIZED ON THE GROUND OK PER MM 21-31-00 PLACARD REMOVED DMI CLEARED, AIRCRAFT RETURNED TO SERVICE. (M)