What was found
DURING APPROACH VPS-ATL, RECEIVED THE 'FLAPS UNLOCK' LEVEL 3 ALERT. THE FLAP POSITION INDICATOR DISPLAYED THE SELECTED 30 DEGREE POSITION. CREW PERFORMED A MISSED APPROACH, DECLARED AN EMERGENCY AND PERFORMED A ZERO FLAP LANDING. LANDING WAS UNEVENTFUL. ATL MAINTENANCE REMOVED AND REPLACED THE FLAP VALVE BLOCK ASSEMBLY. AS A PRECAUTIONARY MEASURE ALSO REPLACED THE FLAP INDICATOR. THE SYSTEM WAS BLED AND CYCLED WITH NO DEFECTS NOTED. THE AIRCRAFT WAS RELEASED FOR FURTHER SERVICE. (M)