What was found
(CAN) ON DESCENT INTO CALGARY COMING FROM WINNIPEG DURING EXTREME COLD CONDITIONS, WHEN THE PILOTS SELECTED 8 FLAPS THE EICAS REGISTERED A FLAP FAIL CAUTION MESSAGE (AMBER). THE FLAPS DID NOT MOVE AND WERE STILL AT 0. AS PER EMERGENCY CHECKLIST THE AIRCRAFT PERFORMED A FLAPLESS LANDING WITH NO OTHER FURTHER COMPLICATIONS. ON THE GROUND THE FLAP SYSTEM RESET AND AN OPERATIONAL CHECK AS PER MM CH 27-51-05-740-801 WAS C/O SERVICEABLE. THE AIRCRAFT WAS THEN RETURNED TO SERVICE AND CONTINUED TO OPERATE FOR THE REST OF THE WEEK WITH NO OTHER FAULTS. LATER AT BASE THE FLEX DRIVE SYSTEM ON THE RT SIDE (THE FLAP ELECTRONIC CONTROL UNIT WAS INDICATING A FAULT ON THE RT SIDE) WAS INSPECTED AS PER MM CH27-53-10 WITH NO FAULTS FOUND. THE DRIVE SYSTEM WAS LUBRICATED AS PER MM CH 12-20-27 AND REINSTALLED. THE ELECTRICAL CONNECTION TO THE BRAKE POSITION SENSING UNIT (BPSU) WAS FOUND BACKED OFF 3 CLICKS. IT WAS RETIGHTENED AND OP CK C/O SERVICEABLE.