What was found
DURING FLIGHT FLAPS WERE DROOPING 2-3 DEGREES, THEN POPPING BACK UP, CAUSING PITCH OSCILLATIONS. AIR RETURN TO MSP. MAINTENANCE ADJUSTED FLAP ACTUATOR, LEFT AND RIGHT FLAP INTERCONNECT PUSHRODS AND FLAP POTS IAW AMM 27-51-00. PERFORMED FLAP FUNCTIONAL TEST, RIGGED FLAP CONTROL SYSTEM POTS, PERFORMED OPERATIONAL TEST OF FLAP CONTROL SYSTEM AND TEST OF THE FLAP CONTROL, OPS CHECK GOOD.