As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 350 LOST CABIN PRESSURE. LT PACK WAS NOT PROVIDING PRESSURIZATION BUT WAS IN AUTO AND INDICATED 160 PSI. ONLY ABLE TO MAINTAIN FL 210 WITH RIGHT PAC AT 260 PSI. BOTH PAC TEMPS NORMAL. FOUND RIGHT ACM DISCHARGE DUCT LOOSE AND RESECURED. REMOVED AND REPLACED LEFT WATER SEPERATOR BAG. OPS CHECKED GOOD IAW DC-9 AMM 21-00.