As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON OVERHEAD PANEL LEFT PACK LIGHT ILLUMINATES WHEN MASTER RECALL IS PUSHED EXTINGUISHES WHEN MASTER CAUTION IS PUSHED TO RESET. DUPLICATED DEFECT NR 1 CONTROLLER FAULTED TCV BITE TESTED IAW MM 21 51 00. REMOVED AND REPLACED NR 1 TCV. OPS AND BITE CHECK GOOD REF AMM 21 51 10.