As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES WITH RECALL. LIGHT CLEARED WITH RESET. PACK LIGHT CAME BACK ON AFTER LANDING. GROUNDED - YES. REMOVED AND REPLACED LEFT RAM AIR INLET ACTUATOR IAW B737-800 AMM 21-51-21/401. RAM AIR INLET ACTUATOR TEST OK. BOTH PZTC BITE TEST NORMAL W/O FAULTS. VERIFIED LEFT PACK OPS CHECKED NORMAL ON GND W/O FAULT LIGHTS. A/C RESTORED TO NORMAL CONFIG.