What was found
EMERGENCY DECLARED, NO EQUIP USED. A/C WAS OUT OF SERVICE. DURING APPROACH GOT SLATS SYS 1 & SYS 2 FAULT. FOLLOWED QRH. T/S SLAT SYS, PER TSM 27-80-02. BOTH SFCC'S FLGING JAM. FOUND LT SLAT TORQ LIMIT TRIPPED & NR 3 SCREWJACK ACT TRIPPED. PERFORMED OIL LEVEL CHECK/SERVICE AMM 12-13-27. PERFORMED BALL NUT GREASE, IAW 12-22-27 & SIG AMT OF WATER PUSHED OUT. REMOVED & REPLACED LT NR 3 SCREW JACK, IAW AMM 27-84-22. OPERATIONS CHECKS GOOD.