As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START UPON RECALL LEFT PACK TRIP LIGHT ILLUMINATED. GROUNDED - YES. TROUBLESHOT PER B737-800 FIM 21-53 TASK 821, FOUND LEFT TCV ACTIVE FAULT. REMOVED AND REPLACED LEFT TEMP CONTROL VALVE PER B737-800 AMM 21-51-10 PG 401, SYSTEM LEAK CHECKED AND OPS CHECKED GOOD. ETOPS SIGNIFICANT SYSTEM GOUND TEST SATISFACTORY.