As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPS ADVANCED MESSAGE ON EICAS FOLLOWED BY LG AIR/GRD FAILURE MESSAGE. LANDING GEAR HANDLE WOULD NOT RELEASE TO THE UP POSITION. MAINTENANCE INSPECTED ALL LANDING GEAR PROXIMITY SWITCHES AND SERVICED ALL THREE LANDING GEAR STRUTS. OPS CHECKED GOOD.