As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APROACH WHEN EXTENDING SLATS, THE LEVER CAN NOT BE MOVED FROM UP/ RET POSITION. LANDING WAS MADE WITH FLAPS / SLATS RETRACTED AND 1.25 VS SPEED. SPRING DETENT HELICAL EXT WAS FOUND BROKEN IN CRANK OF THE FLAP LEVER. IT WAS REPLACED IAW AMM 27-50-00 PAGE 102. TEST ON GROUND SATISFACTORY. P/N OFF AND ON 4938767-1.