What was found
(CAN) FLAP POWER CAUTION ON APPROACH WITH FLAPS STUCK AT 10 (15 SET). QRH WAS COMPLETED AND THE FLAPS WENT TO 15. AFTER LANDING, FLAP POWER CAUTION OCCURRED AGAIN AND THE FLAPS WOULD NOT RETRACT. MAINTENANCE ACCOMPLISHED THE APPROPRIATE FIM TASK AND THE A/C WAS RETURNED TO SERVICE. THE DEFECT REPEATED IN SERVICE AND MAINTENANCE DETERMINED THAT THE ARMING SWITCH WAS STICKING. THE SWITCH WAS TESTED SERVICEABLE AND THE AIRCRAFT WAS SUBSEQUENTLY RELEASED FOR SERVICE. (TC NR 20180313016).