What was found
ON APPROACH T/E FLAPS LOCKED OUT AT 5 UNITS, APPROACH WAS ABORTED. CREW FOLLOWED QRH CHECKLIST. ON RETURN FLAP POS INDICATOR NEEDLES MARRIED UP, CREW SELECTED FLAPS 10 & DOWN TO 30, PERFORMED NORMAL LANDING. MX PERFORMED T/E FLAP ASYMMETRY CHECK & T/E FLAP POSITION INDICATING SYSTEM ADJ TEST. NO DEFECTS NOTED. TECHNICAL SUPPORT REQUESTED ADDITIONAL TROUBLESHOOTING DUE TO INTERMITTENT HISTORY OF FLAP LOCKOUTS. MX INSPECTED ALL T/E FLAP TRANSMISSIONS AND JACKSCREWS, NO DISCREPANCIES WERE NOTED. MX FOUND SIGNS OF ARCING ON LT T/E FLAP POSITION XMITTER CONNECTOR & PLUG. MX REPLACED XMITTER & PLUG, PERFORMED ADJ AND TEST. NO FURTHER DISCREPANCIES. PLUG P/N: BACC63BP16A24S7L, LOC: LT WING T/E, COND: ARCED.