As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT COMES ON WHEN MASTER CAUTION PUSHED. LIGHT GOES OUT WHEN MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PACK/ZONE TEMP CONTROLLER BITE REF B737-900 AMM 21-61-00. #1 LH RAM AIR ACT FAULTED. REMOVED AND REPLACED LH RAM AIR ACTUATOR REF AMM 21-51-21. OPS CHECK NORMAL.