As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 9649 - EN ROUTE FROM YUL TO PVD RECEIVED GEAR DISAGREE WARNING AT FLT LEVEL 280, WITH RED NOSE GEAR INDICATION. EMERGENCY DECLARED, PERFORMED MANUAL RELEASE TO LANDING GEAR. AIRCRAFT LANDED SAFELY IN PVD. REMOVED AND REPLACED NLG RIGHT DOWNLOCK PROX SENSOR WIRE HARNESS.