What was found
NLG LANDING GEAR RETRACTION DID NOT RETRACT - AFTER TAKEOFF UPON GEAR RETRACTION IT FELT AND SOUNDED LIKE THE NOSE WHEEL GEAR WOULD NOT RETRACT. THE UNSAFE RED LIGHT FLASHED ALONG WITH A BANGING NOISE AND POUNDING FROM THE NOSE COMPARTMENT. EXTENDED THE GEAR WITH NO ISSUES AND RETURNED TO LAND. WE FOUND NOTHING WRONG WITH A VISUAL INSPECTION AT THE RAMP. COULD NOT DUPLICATE ANY NOSE LANDING GEAR DISCREPANCIES.