As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5428, GEAR DISAGREE MSG ILLUMINATED AFTER TAKE OFF DURING LDG GEAR RETRACTION WITH THE GEAR HANDLE UP. THE NOSE GEAR ETCAS INDICATION REMAINED WHITE BOXED UP. GEAR EXTENDED NORMAL. EMERGENCY DECLARED AS A PRECAUTION, AIRCRAFT RETURNED AFTER T/O.