What was found
RED GEAR UNLOCK LIGHT WOULD NOT EXTINGUISH AFTER TAKEOFF. ALL 3 GREEN LIGHTS EXTINGUISHED. ABNORMAL AIR NOISE HEARD, SOUND SEEMED TO BE COMING FROM NOSE GEAR AREA. INSPECTED NLG STRUT EXTENTION, AND CASTER. PREFORMED SEVERAL GEAR CYCLES. NO DEFECT NOTED. OPS CHECK NORMAL IAW MM 52-80-20.