What was found
(CAN) RT ENGINE FIRE LIGHT ILLUMINATED ON TAXI TO RUNWAY. INSPECTION OF THE RT ENGINE FIRE DETECTION WIRING AND SENSORS WAS COMPLETED. DUE TO VIBRATION ON TAXI, THE TERMINAL OF THE SENSOR EVIDENTLY MADE CONTACT WITH THE COVER OF THE FCU, PROVIDING A GROUND AND ILLUMINATING THE RT FIRE LIGHT. SENSOR WAS REPOSITIONED AND FIRE BOTTLE WAS REPLACED. TAXI CHECKS WERE COMPLETED AND NO FAULTS WERE FOUND.