What was found
DURING HANGER MAINTENANCE, THE RIGHT INBOARD FLAP INBOARD FIXED TRACK SUPPORT WAS CRACKED. MAINTENANCE INSTALLED A TEMPORARY REPAIR TO THE FLAP TRACK SUPPORT RIB IAW EO. THIS EO SETS THE FLIGHT LIMIT NOT TO EXCEED 400 FLIGHT HOURS BEFORE THE PERMANENT REPAIR IS DONE AND ALSO STATES THE RIB MUST BE REPLACED AT THE NEXT (A) CHECK. MAINTENANCE REMOVED AND REPLACED THE CRACKED FLAP TRACK SUPPORT RIB IN ORDER TO COMPLY WITH A PERMANENT REPAIR OF THIS AIRCRAFT. AIRCRAFT OK FOR SERVICE.