What was found
AFTER TAKEOFF, LG WOW SYS FAIL CAUTION MESSAGE DISPLAYED. FOLLOWED QRH PROCEDURE, MECHANICAL LANDING GEAR FAIL. EMERGENCY DECLARED RETURN TO KLIT-C/A-T/S FAULT CODE 32611306PSS, IAW FIM 32-61-00-810-840. FOUND POSSIBLE NLG STRUT SERVICING OUT OF SPECS. ACCOMPLISHED FULL NLG STRUT SERVICING, IAW WC 32-21-00-006.