As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START ON RECALL LEFT PACK LIGHT ILLUMINATED RESET ON MASTER CAUTION RESET. GROUNDED - YES. PERFORMED BITE TEST OF LEFT & RIGHT PACK/ZONE CONTROLLERS, REF AMM 21-61-00. FOUND LEFT TCV FAULTED. REMOVED & REPLACED LEFT PACK TCV. OPS CHECK GOOD REF AMM 21-51-10. BITE CHECK & VERIFY GOOD