What was found
CLE - FLT 1231 - ON APPROACH TO CLE, CREW WAS UNABLE TO EXTEND FLAPS. CREW ACCOMPLISHED GO AROUND AND QUICK REFERENCE HANDBOOK PROCEDURES. CREW RECEIVED PARTIAL FLAPS USING ALTERNATE FLAP METHOD. HAD FULL LEADING EDGE DEVICES AND 15 DEGREES FLAPS ON TRAILING EDGE. FLIGHT LANDED WITHOUT FURTHER INCIDENT. AN EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE FLAP BYPASS VALVE INTERMITTENTLY OPERATING DUE TO A BAD FLAP POSITION INDICATOR. REMOVED AND REPLACED THE FLAP POSITION INDICATOR AND REMOVED AND REPLACED FLAP BYPASS VALVE (P/N AV13J5144) AS PRECAUTIONARY. OPERATIONAL CHECK AND LEAK CHECK GOOD. (M)