What was found
BOS - FLT 2022 - ON APPROACH TO BOS, FROM DCA, THE RIGHT FLAP LAGGED BEHIND THE LEFT FLAP TO THE POINT WHERE SELECTING FLAPS TO 25 UNITS, FLAPS ASSYMETRY PROTECTION TOOK PLACE. CREW ACCOMPLISHED A GO AROUND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACD THE FLAP POSITION INDICATOR. OPERATIONAL CHECK GOOD PER MM 27-58-01. CYCLED FLAPS UP AND DOWN THROUGH FULL TRAVEL SEVERAL TIMES. NO FLAP SPLIT NOTED ON GROUND. VISUAL INSPECTION OF FLAPS REVEALS NO PROBLEMS. AIRCRAFT OK FOR SERVICE. (M)