What was found
IAH- DURING FLIGHT 4375, A TEST FLIGHT, THE CREW NOTED THAT THE FLAPS FAIL INFLIGHT, CONTROL FAULT WITH FLAPS AT ZERO DEGREES. MAINTENANCE REMOVED AND REPLACED THE RIGHT HAND INBOARD FLAP ACTUATOR, PERFORMED A OPERATIONAL CHECK OF THE FLAP SYSTEM, NO DEFECTS NOTED. A TEST FLIGHT WAS FLOWN, THE TEST FLIGHT WAS SATISFACTORY AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE AND RELEASED FROM TEST FLIGHT.