What was found
DURING APPROACH, THE CREW RECEIVED A FLAP FAILURE MESSAGE. CREW ELECTED TO GO AROUND, COORDINATE WITH DISPATCH & DECLARED AN EMERGENCY. CREW COMMUNICATED WITH F/A AND PAX, RETURNED & LANDED WITHOUT FURTHER INCIDENT. FLAPS FAILED AT 20 DEG ON APPROACH WHEN 30 DEG SELECTED. PERFORMED FLAP RESET PROCEDURE IAW AWAC SUP 98-18I BOX 12 FLAPS RESET. AIRCRAFT REMOVED FROM SERVICE. R&R FLAP HANDLE /GAURD IAW AMM 27-51-01. OPS CHECK GOOD. FAULT NO LONGER EXISTS.