As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
C4 YYC - LEFT WING NR 5 FLAP TRACK OUTBOARD LOWER HORIZ FLANGE UPPER SURFACE AND OUTBOARD VERTICAL FACE HAVE PITTING CORROSION, ALSO INBOARD LOWER HORIZ FLANGE UPPER AND LOWER CORNER SURFACES HAVE PITTING CORROSION. REPAIRED IAW RD8-57-989.