As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON FINIAL APPROACH INTO YYC WHEN GEAR DOWN SELECTED, NOSE GEAR GREEN LIGHT DID NOT ILLUMINATE. GEAR CYCLED, NO CHANGE. AFTER 2 MIN DELAY GREEN LIGHT ILLUMINATED. MANUAL EXTENDION INDICATION ALIGNMENT MARKS CONFIRMS GEAR DOWN AND LOCKED. SYSTEM COULD NOT BE FAULTED BY MAINTENANCE. MAINTENANCE SUSPECTED THE UPLOCK SWITCH. BOTH UPLOCK AND POSITION SWITCHES REPLACED. NO FURTHER PROBLEMS HAVE BEEN REPORTED.