What was found
DURING MASTER CAUTION RECALL, LT PACK ANNUNCIATOR ILLUMINATED. PACK ANNUNCIATOR EXTINGUISHES WITH MASTER CAUTION RESET. ACFT GROUNDED. ON AUTO TEMP CONTROLLER BITE TEST LEFT RAM DOOR ACTUATOR FAULT LOGGED. AFTER RESET FAULT, FAULT CAME BACK AGAIN. IAW FIM 21-61 TASK 837, REPLACED LT RAM AIR DOOR ACTUATOR IAW MM 21-51-21. OPS NORMAL. PACK-ZONE TEMP CONTROL BITE SHOWS NO FAULTS AND LT PACK LIGHT REMAINS EXTINGUISHED ON RECALL. GROUND VERIFICATION SUCCESSFUL.