As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DIVERTED DUE TO CABIN ALTITUDE WARNING AND INABILITY TO MAINTAIN CABIN PRESSURE. ORD FOUND RIGHT AIR CONDITIONING PACK WATER SEPARATOR DRAIN LINES CRACKED. REPLACED PART NUMBERS 213N1001-16 AND 213N1001-15. RETURNED AIRCRAFT TO SERVICE. NOTE: THIS SAME PROBLEM OCCURRED ON 10/16/2005 (NEXT DAY) AND DETAILS ARE ON SDR 2005UALA01150.