What was found
SEA - ON FLIGHT 2267, CABIN PACK HOT CAUTION LIGHT ILLUMINATED DURING CRUISE FLIGHT. AFTER RUNNING CHECKLIST, CAUTION LIGHT WENT OUT. MAINTENANCE INTERRAGATED CDS FOUND 3A02-CABTSOV IN FAULT HISTORY, COMPLIE WITH FIM. CABIN PACK HOT CAUTION CT DID NOT ILLUMINATE, COMPLIED WITH FIM. FOR THE ECS, RAN THE ECS AND CAB PACKS FULL HOT/COLD SEVERAL TIMES WITHOUT DEFECTS. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.