As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, LT A/C PACK LIGHT ILLUMINATED ON RECALL, EXTINGUISHED WITH RESET. ACFT GROUNDED. UNABLE TO DUPLICATE PROBLEM. PERFORMED BITE TEST OF BOTH PACK/ZONE TEMP CONTROLLERS IAW AMM 21-61-00, BOTH OPS NORMAL, NO FAULTS NOTED AND LT PACK LIGHT IN OVERHEAD REMAINS EXTINGUISHED WITH MASTER RECALL.