As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT, RT PACK LIGHT ILLUMINATED. QRH PROCEDURE RAN. LIGHT REMAINED. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTROL BITE. FOUND RT PACK TCV FAULT. REPLACED RT PACK TCV REF: FIM TASK 21-62 TASK 831, MM 21-51-10. OPS CKD GOOD NO FAULTS, REF: MM 21-51-10. ACCOMPLISHED ALT DEACTIVATION PROCEDURES REF MPM CH5 TABLE 3 ITEM 1. REPLACED PRECAUTIONARILY THE NR 2 ACAU. ALL GROUND VERIFICATION TEST PASSED.