What was found
CREW PERFORMED AN AIR TURN BACK TO MEM FOR AN UNSAFE INDICATION ON THE NR 3 L/E SLAT. WHEN CREW WENT FROM FLAPS 5 TO 2 THEY HAD AN UNSAFE INDICATION ON NR 3 L/E SLAT. WHEN CREW RETURNED TO FLAPS 5 THE UNSAFE INDICATION WENT AWAY. NR 3 LED UNSAFE WHEN RAISING FLAPS FROM 5 DEG TO 2 DEG AFTER T/O. COMPLIED WITH QRH: GOT SAFE INDICATION AT 5 BUT UNSAFE AGAIN WHEN RETURNED TO FLAPS 2. LANDED NORMALLY AT FLAPS 30. L/E BREAKOUT BOX SHOWED RESISTANCE OF APPROX 240 OHMS ON SLAT RETRACT SW NR 4. REPLACED D904J AND RETESTED GOOD (>150,000 OHMS) WITH THE BREAKOUT BOX. CHECKED WIRING ON S201 SLAT SW NR 4 RETRACT AND S311 SLAT SW NR 4 EXTEND WITH FLUKE AND MEGGAR, ALL WIRES CHECK GOOD. CHECKED SW S311 WITH SLATS EXTENDED AND WITH SLATS RETRACTED, CHECKED GOOD ON BOTH POSITIONS, SW IS GOOD. REF SWMP AND WDM 27-81-02. REINSTALLED REMOVED PANEL IN REF TO STANDARD MX . OPS CHECKED FLAPS MULTIPLE TIMES WIT H NO FAULTS FOUND WITH THE POSITION OF THE FLAPS/SLATS AND INDICATING SYS IN THE COCKPIT IAW AMM CH 27-80-000-0,27-80-000-1, ALL FLAP SYS OPS CHECKS NORMAL. (CLOSED)