What was found
ON FLIGHT 4089 THE CREW REPORTED THAT WHILE EXCITING FINAL STAGES OF ARRIVAL DESCENT AFTER HAVING FLOWN THROUGH A 2 MIN EXPOSURE TO MOD RIME ICE AT FLAP 9 SELECTION FLAPS REMAINED AT ZERO. SYSTEM WAS RESET AFTER CHECKLIST, COMPLIANCE AND FLAP SYSTEM OPERATIONS WERE NORMAL AFTER BEING RETRACTED THEN RESET TO 9. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. UPON ARRIVAL MOC AND SOC WERE ADVISE AND CONSULTED. THE AIRCRAFT WAS REMOVED FROM SERVICE. PERFORMED INSPECTION OF FLAPS NO DEFECTS NOTED. PERFORMED FIM 27-51-60-810-803-A, FOUND TO BE TRANSITORY CONDITION, SYSTEM OPERATIONS WERE NORMAL. THE AIRCRAFT WAS RETURNED TO SERVICE.