As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAE - FLT 3812 - DURING ROUTINE SCHEDULED C-9 MAINTENANCE CHECK, FOUND NR 6 SLAT CENTER AUXILIARY TRACK CUT OUT ON FIXED LEADING EDGE HAS CRACK CONTINUING PAST PREVIOUS BLEND OUT. CUT OUT DAMAGED SKIN SECTION. FABRICATED NEW SKIN AND REPAIR DOUBLER AND INSTALLED REPAIR PARTS PER ER NR 2-57-31-16. (X)