What was found
FLIGHT 5850 - RECEIVED A FLAP FAIL CAUTION MESSAGE AFTER LANDING WHEN FLAPS WERE SELECTED TO 20 DEGREES. 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.