As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3561 - ORF - AIR GROUND FAIL MESSAGE ON EICAS AND UNABLE TO RETRACT THE GEAR. MAINTENANCE INSPECTED AND FOUND THE NOSE WOW PROXIMITY SWITCH AND CONNECTOR CORRODED. REMOVED AND REPLACED THE PROX SWITCH AND PERFORMED SEVERAL GEAR SWINGS.