What was found
AFTER TAKEOFF FROM GSO, GOT NOSE LANDING GEAR DOOR UNSAFE INDICATION, WHEN GEAR HANDLE WAS PLACED IN NEUTRAL POSITION ALL GEARS EXTENDED. RETURNED TO GSO AND MADE A SAFE LANDING. PERFORMED NORMAL SYSTEM LANDING GEAR RETRACTION IAW A300 MM 32-30-00 PAGE 501, 5 TIMES, NO FAULTS NOTED. AS PRECAUTION, THE LANDING GEAR CONTROL MICRO SWITCH UNIT WAS REPLACED AS MOST PROBABLE CAUSE. COMPLETED NORMAL SYSTEM LANDING GEAR RETRACTION TEST IAM 32-30-00 PAGE 501, NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.