As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TPA-PIT - FLT 1264 - AFTER TAKEOFF, THE CABIN WOULD NOT PRESSURIZE IN EITHER AUTO OR MANUAL MODE. THE AIRCRAFT RETURNED TO THE FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE RECONNECTED A LOOSE COUPLING SLEEVE AT THE LEFT AIR CONDITIONING PACK ACM OUTLET. (M)