As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATES ON RECALL CLEARS ON M/C RESET. GROUNDED - YES. REMOVED AND REPLACED RAM AIR INLET ACTUATOR IAW B737-800 AMM 21-51-21 BITE TEST GOOD IAW 21-61-00 FOUND TEMPERATURE CONTROL VALVE FAILED. REMOVED AND REPLACE TEMPERATURE CONTROL VALVE IAW AMM 21-51-10. OPS CHECK GOOD.