As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT AT FL80 NO AIRFLOW FROM PACK 1 OR 2 WITH NO PRESSURIZATION. BURSTING DUCT NOISE FROM UNDER FLT DECK FLOOR. UPON INSPECTION OF AIRCRAFT FOUND DUCT FROM HEAT EXCHANGER ON PACK 1 COMPLETELY DETACHED AND SLEEVES DAMAGED. R/R SLEEVES AND CLAMPS IN REF TO AMM 21-20-04. PERFORMED COOLING SYSTEM OPS CHECK. OPS CHECK GOOD. PERFORMED PRESSURIZATION CONTROL SYSTEM ADJUSTMENT TEST IAW AMM 21-31-00. OPS CHECK GOOD.