What was found
AFTER TAKEOFF, RETRACTING THE FLAPS FROM POSITION 5 TO 1, FLAPS SPLIT. THE RIGHT FLAP STOPPED AT 2 AND THE LEFT FLAP STOPPED AT 1. A/C TURNBACK, MADE AN UNEVENTFUL LANDING. PERFORMED ASSEMITY CHECK. UNLOCKED FLAP INDICATE. OPS CHECKS NORMAL, FLAP CYCLED STANDBY AND NORMAL. SYSTEM OPERATED NORMAL PER BOEING MM.