As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER T/O, RT MLG DOWNLOCK GREEN LIGHT STAYS ON AFTER GEAR UP SELECTION. FLIGHT CREW EXTENDED THE LANDING GEAR AND LANDED BACK AT BASE. LANDING GEAR INSPECTION CHECKED - OK. PSEU CODES RETRIEVED (53, 55). R/R PSEU. LANDING GEAR TESTED OK. AIRCRAFT RETURNED TO SERVICE.