What was found
FLAP DRIVE CAUTION LIGHT ILLUMINATED INTERMITTENTLY DURING CRUISE, DECENT AND LANDING. PERFORMED FLAPS 15 LANDING, FLAPS OPERATED NORMALLY. INTERROGATED THE CDS. NO FAULTS FOUND. PERFORMED AN OPS TEST OF THE WING FLAP SYS IAW AMM TASK 27-50-00-710-801. NO FLAP DRIVE CAUTION LIGHT. AS A PRECAUTIONARY MEASURE R & R THE ADVISORY CONTROL UNIT IAW AMM TASK 31-51-06-000-801 AND 31-51-06-400-801. PERFORMED AN OPS TEST OF THE CAUTION ADVISORY LIGHTS IAW AMM TASK 31-51-26-710-801. OPS CHECK GOOD. PERFORMED AN OPS CHECK OF THE ENGINE FAULT CODE INDICATIONS IAW AMM TASK 77-31-00-710-802. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.