As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF PLACED GEAR HANDLE UP, FOLLOWED BY GEAR DISAGREE AND NOSE GEAR DOOR OPENED EICAS WARNING MSG'S. C/W QRH PROCEDURES LANDED AND GROUND PERSONNEL INSERTED GEAR PINS INTO GEAR. EMERGENCY DECLARED. A/C RETURNED TO ERI AFTER T/O. FLT 4825 CX.