As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM MHT TO DTW RECEIVED NOSE DOOR OPEN AND GEAR DISAGREE WARNING MSG. FOLLOWED QRH AND GEAR EXTENDED NORMAL. EMERGENCY DECLARED, A/C RETURNED TO MHT LANDED SAFELY. REMOVED AND REPLACED NOSE LANDING GEAR WOW NR 2 WIRE HARNESS.