What was found
NR 3 MAIN CABIN SMOKE DETECTOR GAVE FAULTY INDICATION, DIVERTED TO GAL AT 0405Z. DEFERRED NR 3 SMOKE DETECTOR IAW MEL 26-7. OFF LOADED CARGO & PROCEEDED TO ANC. AIRCRAFT WAS REPAIRED AT ANC, NR 3 SMOKE DETECTOR CONNECTOR WAS FOUND TO HAVE A DAMAGED WIRE THAT HAD GNDED OUT CAUSING THE FALSE INDICATION. NR 3 SMOKE DETECTOR CONNECTOR WAS REPAIRED IAW DC-6 LMM 28-5-5, OPERATIONS CHECKED GOOD.