As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT HAND PACK LIGHT ILLUMINATED ON RECALL AFTER ENGINE STARTED. RAN QRH PROCEDURE AND LIGHT CLEARED WHEN MASTER CAUTION SYSTEM RESET. GROUNDED - YES. UPON ARRIVAL PRESSED RECALL AND NO PACK LIGHT ILLUMINATED. PERFORMED PACK TEMPERATURE CONTROL BITE PER B737-900 FIM 21-62 TASK 801 AND HAD NO FAULTS ON EITHER PACK TEMP CONTROLLERS. RAN PACKS ON GRD WITH NO DEFECTS NOTED.