As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK ABNORMALLY HIGH AIRFLOW IN FLIGHT DECK. GROUNDED - YES. PERFORMED B737-800 FIM 21-52 TASK 801, B737-800 AMM 21-51-01. FOUND NUISANCE TRIM VALVE FAULT. AFTER OPS CHECK, FAULTS AND ABNORMAL AIRFLOW ISSUE CLEARED. OPS CHECK GOOD.