What was found
LAS FLT 883 EN ROUTE FLL TO LAS. AIRCRAFT EXPERIENCED A VERY LOUD NOISE AND A MILD VIBRATION IN THE COCKPIT DURING CLIMB, WITH ALL INDICATIONS NORMAL. AFTER LEVEL OFF, THE NOSE GEAR DOORS HAD XX-XX INDICATION. THE FLIGHT DESCENDED TO FL 240 AND RECYCLED THE GEAR. THE XX-XX INDICATION WENT AWAY AND THE FLIGHT PROCEEDED TO LAS WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NOSE LANDING GEAR DOOR ACTUATOR. OPERATIONALLY CHECKS OK.