As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BUF - FLT 461 - AFTER TAKEOFF FROM BUF, LANDING GEAR FAILED TO RETRACT. FLIGHT RETURNED TO FIELD AT BUF AND LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE LANDING GEAR ACCESSORY UNIT. OPERATIONAL CHECK GOOD. PERFORMED REQUIRED CHECKS PER MM 32-09. OPS CHECK GOOD. (X)