What was found
CREW REPORTED ON APPROACH A FLAPS FAIL CAS MESSAGE AT 20 DEGREES. CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND PERFORMED A RESET OF THE SDU. MAINTENANCE INSPECTED FLAP LEFT HAND AND RIGHT HAND, NO SKEW NOTED IN ACCORDANCE WITH THE MAINTENANCE MANUAL 27-51-15. MAINTENANCE PERFORMED OPS CHECK OF THE FLAPS IN ACCORDANCE WITH THE AIRCRAFT MAINTENANCE MANUAL 27-54-00-866-801 AND 27-54-00-866-802. OPERATIONAL CHECKS GOOD AT THIS TIME. AIRCRAFT WAS RELEASED FOR SERVICE.