What was found
(CAN) FLT CREW REPORTED NLG GREEN DOWNLOCK INDICATION WOULD NOT EXTINGUISH WHEN MLG SELECTED UP. MLG DID RETRACT. GREEN LIGHT WOULD NOT EXTINGUISH. MLG CYCLED 3 TIMES, NO JOY . RETURNED TO BASE. ABLE TO DUPLICATE FAULT ON GROUND. NLG DOWNLOCK SENSOR REPLACED, NO JOY. MLG ACCESSORY UNIT REPLACED, ALSO NO JOY. CONDUIT LEADING FROM DOWNLOCK SENSOR TO MLG ACCESSORY UNIT MOVED WHICH EXTINGUISHED LIGHT. CONDUIT & WIRING REMOVED. WIRING INSPECTED. UNABLE TO FIND FAULT WITH WIRING. WIRING & CONDUIT WERE REINSTALLED, NEW CONNECTORS FOR TERMINAL BLOCK. MLG SWUNG SEVERAL TIMES WITHOUT FAULT. SYS WIRING INSPECTED SEVERAL MORE TIMES & TESTED, NO PROBLEMS FOUND.