What was found
ON TAKEOFF UNABLE TO RETRACT LG, RAN QRH 13.5, RETURNED. PERFORM FIM 32-33-00. FAILURE OF SPDA1 DC POWER MODULE. R & R SPDA1 DC POWER MODULE IAW AMM 24-61-13. PERFORMED GEAR SWING IAW AMM 32-33-00. OPERATIONS CHECKED GOOD, OK FOR SERVICE. FLIGHT CREW HAD DECLARED AN EMER & ASKED FOR CFR TO BE STANDING BY. AIR RETURN PERFORMED.