What was found
SHORTLY AFTER TAKEOFF, AFTER GEAR RETRACTION, CREW RECEIVED A LG WOW SYS FAIL EICAS MESSAGE. EMERGENCY DECLARED, DECISION WAS MADE TO RETURN TO DEPARTURE. ACFT LANDED UNEVENTFULLY. AFTER TROUBLESHOOTING FOUND THAT THE NLG STRUT SEAL FAILED. R & R NLG STRUT SEALS.