As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, NOSE GEAR WOULD NOT RETRACT. RECEIVED A GEAR DISAGREE WARNING MESSAGE. COMPLIED WITH QRH, RECEIVED GEAR DOWN AND LOCKED INDICATION. MESSAGE APPEARED 28 SECONDS AFTER HANDLE MOVEMENT. NOSE EGAR SHOWED RED ON EICAS, MANUAL RELEASE SYSTEM WAS UTILIZED. EMERGENCY WAS DECLARED. RECEIVED STEERING INOPERATIVE CAUTION MESSAGE AS WELL.