As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH PACK LIGHT ON AFTER PUSHING RECALL, GOES OUT AFTER PUSHING MASTER CAUTION. GROUNDED - YES. PERFORMED B737-800 FIM 21-53 TASK 821 FOR LH PACK FOUND "THIS PACK - TCV" FAULT. PERFORMED FIM 21-62 TASK 830 FOR TCV FAULT. NO DEFECTS NOTED AT THIS TIME.