As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM: VERY LOW AIR FLOW IN THE COCKPIT, ON THE GROUND OR IN THE AIR. ACCOMPLISHED T/S IAW FIM 21-62 TASK 825 AND FOUND LEFT PACK TEMPERATURE SENSOR AT FAULT. REMOVED & REPLACED LT PACK TEMP SENSOR AS PER B737 AMM 21-51-52, OPS CHECK NORMAL AS PER B737 AMM 21-51-52, NO DEFECTS NOTED AT THIS TIME.