As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED AFTER PUSHBACK, EXTINGUISHED WHEN MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED BITE TEST OF LT AND RT PACK/ZONE CONTROLLERS. FOUND RT TCV FAULTED. REMOVED & REPLACED THE RT TEMPERATURE CONTROL VALVE IAW AMM 21-51-10-401. OPS CHECKED GOOD. NO FAULTS.