As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK AND ENGINE START LEFT A/C PACK LIGHT ILLUMINATED ON RECALL. ZONE TEMP CONT BITE SHOWS PREV FLT LOGGED THIS PACK TCV FAULT. REPLACED LEFT PACK TEMP CONTROL VALVE IAW AMM 21 51 10 PAGEBLOCK 401. ZONE TEMP CONT BITE TEST GOOD. VALVE LEAKS CHECK GOOD. VERIFIED LEFT PACK OPS CHECK NORMAL ON GROUND.