What was found
DURING APPROACH, SLATS EXTENDED INITIALLY TO 16 DEGREES. SLATS RETRACTED WHEN 25 DEGREES FLAP WERE SELECTED. COULD''NT DUPLICATE ON GROUND. OPS CHECKED NORMAL IAW FIM 27-80-00. REQUIRES FURTHER INVESTIGATION. AIRCRAFT INSPECTED AND PREPARED FOR FERRY FLIGHT IAW PROCEDURES, CHAPTER 11 TAI GMM. AIRCRAFT CONSIDERED AIRWORTHY FOR FLIGHT INTENDED. (M)