As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON PUSH BACK LH PACK LIGHT ILLUMINATED W/ MASTER CAUTION RECALL. GROUNDED - YES. LT ZONE TEMP CONTROL SHOWS "THIS SIDE TCV" FAIL. VERIFIED VALVE MOVING VERY SLOW, REPLACED TCV REF AMM TASK 21-51-10-000-801 AND 21-51-10-400-801. RAN APU BLEED AND LT PACK NO LEAK DETECTED. PERFORMED TEMP ZONE CONTROL BITE TEST REF AMM TASK 21-60-00-700-806-002 NO DEFECT NOTED.