As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON TAKEOFF THE GEAR FAILED TO RETRACT TO THE LOCKED POSITION. THE CREW SELECTED THE GEAR DOWN AND ONLY THE MAIN GEAR EXTENDED. THE CREW USED THE EMERGENCY PROCEDURES AND EXTENDED THE GEAR. INVESTIGATION FOUND THAT EITHER THE PUMP OR THE MOTOR APPEARS TO HAVE CAUSED THE FAULT.