As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. EXTINGUISHED ON RESET. GROUNDED - YES. PERFORMED PACK/ZONE TEMPERATURE CONTROLLER BITE TEST REF B737-900 AMM TASK 21-61-00-700-806-002. FAULT FOUND ON L RAM AIR ACTUATOR. REMOVED & REPLACED LT RAM AIR INLET ACTUATOR REF AMM 21-51-21. OPS & BITE TEST GOOD.