As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK WILL NOT MAINTAIN A 10,000 FOOT CABIN IN AUTO OR MANUAL MODE WITH CARGO HEAT OUTFLOW VALVE CLOSED AND MIX VALVE AT HALF POSITION. CABIN CLIMBED AT 1200 FPM. ACCOMPLISHED ALTERNATE PROCEDURE PER AOM 5.02. REPLACED APU AIR DUCT. OPS CHECK GOOD PER M/M 21-20.