As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER DEPARTURE THE FLIGHT CREW WERE UNABLE TO RAISE THE LANDING GEAR. THE FLIGHT CREW RETURNED AND THERE WAS NIL ADVERSE PASSENGER REACTION. RESOLUTION FIM 32-61-00-810-840A CARRIED OUT. NLG WOFW PROX SENSOR P36 REPLACED PER AMM 32-61-01 PB401. LANDING GEAR EXTENSION AND RETRACTION TEST CARRIED OUT PER AMM 32-30-00-710-801-A. NO FAULTS.