As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, ON DEPARTURE AND UPON RETRACTING FLAPS LEADING EDGE FLAP TRANIST ILLUMINATED INTERMITTANTLY AND THEN FULL STEADY AFTER APPROXIMATELY 2 MINUTES. ACCOMPANIED BY LEADING EDGE FLAP 2 INDICATING FULL EXTEND. MINIMAL ROLL NOTED INFLIGHT. LEADING EDGE TRANSITON AND LEADING EDGE FLAP 2 INDICATED FULL EXTEND WITH FLAP HANDLE IN UP POSITION AT GATE. R&R #2 K-FLAP PROXIMITY SENSOR PER AMM.