What was found
AFTER T/O RT MAIN GEAR SHOWED NOT RETRACTED RED ON BOTH THE INDICATORS COMPLIED WITH QRH LANDED BACK AT DEPARTURE. DROPPED RT GEAR DOOR TO ACCESS GEAR/ DOOR UP SENSOR. INSPECTED WIRING AND CONDITION OF SENSOR. NO DEFECTS NOTED. NOTICED THAT BOLT THAT ATTACHES SENSOR LEVER LINK TO UPPER SIDE GEAR BRACE WAS BENT. REMOVED BOLT AND FOUND LINK BEARING TO BE DAMAGED CAUSING A 7/16 OF AN INCH PLAY IN THE SENSOR LINKAGE. REMOVED LINKAGE, REPLACED BEARING AND REINSTALLED LINKAGE. CK'D SENSOR TO TARGET GAP, GAP CK'S GOOD. CK'D SAME LINKAGE ON LT GEAR. NO DEFECTS NOTED IAW MM 32-61-15-4.