What was found
SHIP 9580 -ATB/DE- FUNCTIONAL CHECK FLIGHT. THE CREW RETURNED TO THE DEPARTURE FIELD AFTER THE LANDING GEAR FAILED TO RETRACT PROPERLY. GEAR RETRACTION SHORTLY AFTER TAKEOFF PRODUCED A RED "RIGHT GEAR UNSAFE" INDICATION. QRH 14.18 WAS COMPLIED WITH. LOWERING THE GEAR, CREW RECEIVED THREE GREEN SAFE INDICATIONS. RAISING THE GEAR AGAIN, CREW RECEIVED BOTH LEFT & RIGHT RED GEAR UNSAFE INDICATION. CREW DECLARED AN EMERGENCY WITH ATC AND RETURNED TO QRO. GEAR HANDLE PLACED BACK IN THE DOWN POSITION, THREE GREEN GEAR RECEIVED. NORMAL LANDING AND TAXI TO THE HANGER. (LP #5049610)