What was found
GEAR UNSAFE LIGHT ILLUMINATED DURING GEAR RETRACTION ALONG WITH 3 GREEN INDICATION LIGHTS. THE RT AND LT MAIN GEAR THEN CAME BACK DOWN. THERE WAS A DROP IN THE HYD PRESS TO APPROX 1000 PSI PLACING THE GEAR HANDLE IN THE DOWN POSITION THE UNSAFE LIGHT EXTINGISHED AND HAD A 3 GEAR DOWN AND LOCKED LIGHTS ILLUMINATED. FOUND NLG WIRE HARNESS HAS A BROKEN WIRE. INSTALLED NEW WIRE HARNESS . PERFORMED GEAR SWINGS AND FOUND NO BINDING. ALL MLG RETRACT AND EXTENDED PROPERLY. GEAR INDICATOR LIGHTS FUNCTION PROPERLY. IAW MM 32-30-00.