As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SLAT TRACKS 2-1 (P/N: CC670-12040-3) AND 2-2 (P/N: CC670-12051-9) ON THE RH WING WERE FOUND TO HAVE CORROSION DAMAGE ON THE UPPER AND /OR LOWER SURFACES. PERFORMED PERM REPAIR IAW CRJ900 ILLUSTRATED PARTS CATALOG (IPC) 27-81-41, FIGURE 5, ITEM 15 AND 85 (REV. 70 DATED 10 AUG 2021).