As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IMMEDIATELY AFTER TAKEOFF LG AIR & GND FAIL MSG APPEARED ON EICAS & REMAINED UNTIL LG EXTENDED. SERVICED NOSE STRUT IAW AMM WC 62-600-06 DUE TO IMPROPERLY SERVICED NOSE STRUT. PERFORMED GEAR SWING IAW AMM 32-30-00 OPERATIONS CHECKED GOOD.