What was found
FLT 4639 - CREW SELECTED FLAPS TO 8 DEGREES AND FLAPS FAIL MESSAGE APPEARED ON EICAS. CREW FOLLOWED PROCEDURES AS LAID OUT IN ABNORMAL SECTION OF QRH PAGE 8-8. CREW INFORMED ATC OF SITUATION, DECLARED AN EMERGENCY, AND REQUESTED EMERGENCY VEHICLES BE STANDING BY. CAPTIAN SAFELY PERFORMED A ZERO FLAP LANDING. MAINTENANCE REPLACED LEFT AND RIGHT FLAP ACTUATORS, BPSU''S AND FLEX SHAFTS. OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE. (M)