What was found
AFTER TAKEOFF, THE NOSE GEAR WAS SLOW TO RETRACT. MAIN GEAR RETRACTED NORMALLY. THE NOSE GEAR DOOR LIGHT AND UNSAFE LIGHT REMAINED ON FOR 4-5 SECONDS. FINALLY RETRACTED WITH ALL LIGHTS OUT. LDG GEAR INOPERATIVE CAUTION LIGHT REMAINED EXTINGUISHED. PERFORMED ALTERNATE GEAR EXTENSION AS A PRECAUTION. ALTERNATE EXTENSION WAS NORMAL. LANDING UNEVENTFUL. REMOVED FROM SERVICE. INSPECTED NOSE LANDING GEAR, AND FOUND CONTAMINATS BETWEEN PROXIMITY SENSOR AND TARGETS, CLEANED. COMPLIED WITH A FUNCTIONAL TEST OF LANDING GEAR IAW 32-31-00-720-801, FUNTIONAL TESTED GOOD. PSEU FAULT HISTORY SHOWED NG LK 2 NEAR, NG LK 1 NEAR, FLIGHT LEG HISTORY SHOWED NG DR CL,FAULT UNREASONABLE FAR, NG WOW 2 FAULT UNREASONABLE NEAR, NG WOW 1 FAULT UNREASONABLE NEAR. CLEARED FAULT HISTORY IAW FIM 32-00-00-810-815, PARA 1-4A (1)(B), PARA 5A (5)-5, (10), AND PARA 6. NO DEFECTS NOTED. FAULTS DID NOT RETURN. NO PARTS REPLACED. RETURNED TO SERVICE.