What was found
AIRCRAFT WAS GROUNDED: LEADING EDGE FLAPS TRANSIT LIGHT ILLUMINATED IN FLIGHT INTERMITTENTLY. # 3 LEADING EDGE DEVICE SHOWED DEPLOYED INTERMITTENTLY. MAINTENANCE TROUBLESHOT LEADING EDGE FLAPS TRANSIT LIGHT PER AMM 27-88-11-700-801. PERFORMED BITE TEST OF FLAPS / SLAT ELECTRONICS UNIT (FSEU) PER AMM 27-51-00-740-801. NO ACTIVE FAULT ON FSEU. FLAPS/SLATS POSITION SENSOR MATCHES WHAT AMM STATES. MAINTENANCE COULD NOT DUPLICATE FAULT.