As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED-UPON ROTATION WE RECEIVED A LANDING GEAR AIR TO GROUND FAIL EICAS MESSAGE. TRIED TO MOVE THE LANDING GEAR LEVER UP AND IT WAS STUCK AND WOULD NOT RAISE. WE RAN THE QRH FOR THE EICAS MESSAGE AND IT DID NOT HELP. MADE AN AIR RETURN TO VEGAS FOR AN UNEVENTFUL LANDING. CORR ACTION- MX R&R'D NLG PROX HARNESS PN 145-21495-403 AND NLG PROX SWITCH OFF PN 8-527-01 SN 18854 ON PN 8-527-01 SN A20530 ALL OPS CHECKS GOOD. PERFORMED MX CHECK FLIGHT AND ALL CHECKED GOOD AS WELL.