As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT FROM BUF, CREW RECEIVED A GEAR DISAGREE MESSAGE AND THE LANDING GEAR WOULD NOT RETRACT. EMERGENCY WAS DECLARED. FLIGHT LANDED WITH OUT FURTHER INCIDENT AND TAXIED BACK TO GATE. DEFERRED LANDING GEAR RETRACTION SYSTEM. SERVICED #1, 2, 3 HYDRAALICS & BLEED SYSTEM JACKED AND CYCLED AIRCRAFT, FUNCTION TEST GOOD. THIS CLEARS MEL.