As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. LIGHT EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED NR 2 PACK ZONE TEMP CONTROLLER BITE REF AMM 21-62, TASK 801 AND VERIFIED SHOWING PACK ZONE CONTROLLER FAULT ON ALL SAVED LEGS. R & R NR 2 PACK ZONE TEMP CONTROLLER. OPS AND BITE CK GOOD. NO FAULTS FOUND.