What was found
FLIGHT 5638 - DURING ATL APPROACH RECEIVED A FLAP FAIL CAUTION MESSAGE AT 45 DEGREE FLAP POSITION SETTING. COMPLIED WITH AD 98-20-01 FLAP CAUTION MESSAGE FIRST EVENT MAINTENANCE ACTION PARAGRAPH (B) 1, 2, 3 (A, B, C AND E). FLAP SYSTEM WAS RESET WITH NO FURTHER FLAP CAUTION MESSAGES.