As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON T/O FROM BTV RECEIVED GEAR DISAGREE WARNING MSG, NOSE GEAR DID NOT RETRACTED MAINS DID. FOLLOWED QRH, EMERGENCY DECLARED. A/C RETURNED TO BTV LANDED SAFELY, ALL GEAR DOWN AND GREEN FOR LANDING. REMOVED AND REPLACED HYDRAULIC PUMP 3A. NO FURTHER DEFECTS.