What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMB OUT AROUND 4000 AGL NOSE GEAR EXTENDED WITH BOTH RED AND GREEN INDICATORS LIGHT. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW. ACCOMPLISHED FIM 32-30-00-810-810 AIRCRAFT JACKED AND GEAR SWUNG. NO FAULTS NOTED. ACCOMPLISHED RESISTANCE CHECKS ON BOTH NOSE GEAR SENSORS S854 AND S456. ALL CHECKS NORMAL. NO FAULT FOUND.