As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) UNABLE TO RETRACT LANDING GEAR DURING CLIMB. GEAR DOORS LOCKED. NO TRANSITION, NO YELLOW LIGHTS. THREE GREEN LIGHTS REMAINED CONSTANT ON. RECYCLED WITHOUT SUCCESS. RETURNED TO BASE. NLG CENTERING PROXIMITY SENSOR FOUND SHORTED. SENSOR REPLACED ACC AMM 32-61-03.