As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT, RECEIVED SEL AIR SYS MAN. CREW NOTICED NR 1 PACK TEMP INCREASING AND 3 MIN LATER AIR MANF 1 FAIL LEVEL 3 ALERT. ENG 1 BLD SHOWED CLOSED AND 1-2 ISOL & 1-3 ISOL SHOW CLOSED. *S/D* REMOVED AND REPLACED NR 2 ACM PER MM 21-53-21-2. OPS CK OK MEL IS CLEARED.