As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN ALTITUDE HI ON EICAS. MASK NOT DEPLOYED. - PERFORMED TROUBLESHOOTING PER FIM 21-31-00. PERFORMED GVI OF LH AND RH PACK OUTLET DUCTS PER AMM 21-51-21. FOUND RH PACK OUTLET BELLOW DETACHED FROM DUCT. REATTACHED PACK OUTFLOW BELLOW PER AMM 21-51-21. PERFORMED CABIN LEAK TEST PER AMM 21-31-00. CABIN WAS PRESSURIZED FOR 20 MIN WITH NO CHANGE IN PSI. AC OK FOR RTS.