As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE CABIN PRESSURIZATIN CLIMB 1000 FEET PER MINUTE AT 25,000 FEET AND FLOW LIGHT CAME ON. MAINTENANCE CHECK REVEALED LEFT HAND AIR CONDITIONING PACK DUCT HAD BECOME DISCONNECTED BETWEEN AIR CYCLING MACHINE AND HEAT EXCHANGER. DUCT REINSTALLED.