What was found
LEFT PACK LIGHT ILLUMINATED ON RECALL; EXTINGUISHES UPON MASTER CAUTION RESET. ACFT GROUNDED. CONFIRMED DEFECT, BITE OF LT PACK ZONE TEMP CONTROL IAW FIM 21-62, TASK 801 SHOWED RAM AIR ACTUATOR FAULT. ACCOMPLISHED T/S FOR RAM AIR ACTUATOR FAULT IAW FIM 21-62, TASK 837. VERIFY TEST CONFIRMED FAULT 2 OUT OF THE 3 TIMES IT WAS RUN. REMOVED, REPLACED, AND TESTED LT RAM AIR ACTUATOR IAW AMM 21-51-21-000-801 AND AMM 21-51-21-400-801. OPS NORMAL. PERFORMED PACK ZONE TEMP CONTROL TEST IAW AMM 21-61-00-700-806-002 - TEST PASSES WITH NO FAULTS.