What was found
DCA - FLT 2046 - AFTER TAKEOFF FROM DCA, EN ROUTE TO BOS, CREW RECEIVED BOTH THE GREEN AND RED NOSE LANDING GEAR INDICATION LIGHTS WHEN THE GEAR HANDLE WAS PLACED IN THE UP POSITION. IN ASSOCIATION WITH QUICK REF HANDBOOK, CREW EXTENDED GEAR AND RECEIVED A NORMAL GEAR INDICATOIN OF ALL GREEN LIGHTS. FLIGHT RETURNED TO FIELD DCA AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE ACCOMPLISHED LANDING GEAR POSITION AND WARNING CHECK PER MM 32-61-00 AND NOSE LANDING EXTENSION AND RETRACTION CHECK PER MM 32-33-00. ALSO, ACCOMPLISHED NOSE LANDING GEAR INDICATION SYSTEM TROUBLESHOOTING PER MM CHAPTER 32. REMOVED AND REPLACED NOSE GEAR RED LIGHT CIRCUIT CARD M983. PERFORMED GEAR SWING.