What was found
SAT - FL1594 - ON CLIMB-OUT, AT APPROX 3,000 FEET, THE FLAPS WERE MOVED TO 10 UNITS. THE CAPTAIN NOTICED ONE SIDE READ 13 UNITS AND THE OTHER 10 UNITS. THE CREW ELECTED TO RETURN TO FIELD AT SAT. FLIGHT LANDED WITHOUT FURTHER INCIDENT. CREW DID DECLARE AN EMERGENCY. MAINTENANCE REMOVED AND REPLACED THE FLAP POSITION INDICATOR (P/N2061-14-1). SUBSEQUENTLY, THE FOLLOWING DAY, THE AIRCRAFT EXPERIENCED ANOTHER SPLIT FLAP CONDITION. MX REMOVED AND REPLACED THE LEFT FLAP TRANSMITTER. OPERATIONAL CHECK GOOD. (M)