As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON FINAL APPROACH TO VANCOUVER AT 1600 AGL "L/G NOT DOWNLOCKED" WARNING CAME ON. GEARS CYCLED. ALL EXTENDED NORMALLY THE SECOND TIME. THE GEAR AT FAULT WAS THE RT MAIN. MAIN LANDING GEAR SELECTOR VALVE REPLACED AS PER AMM TASK 32-31-12-400-001, LEAK CHECKED AND GEAR RETRACTED SEVERAL TIMES, NO FAULT FOUND.