As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DECLARED EMERGENCY. DUIRNG CLIMB OUT, LG WOW SYS FAIL MESSAGE ON EICAS. COMPLIED W/QRH. ALL COMPONENTS FUNCTIONED NORMALLY ON LANDING ROLLOUT; FOUND NLG LEAKING FLUID FROM LOWER SLIDING TUBE. STRUT EFLATED. NLG SPARE SEAL ACTIVATED IAW AMM 32-21-02. SERVICED NLG STRUT IAW AMM 12-12-09. NO LEAKS NOTED. PSEM 1 AND 2 CHECK OK WITH NO FAULTS. NO EICAS MESSAGES. ACFT OK TO CONTINUE SERVICE.