As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK MAINTENANCE FOUND CRACK ON RIB 11A INTERNALLY ON LH HORIZONTAL BETWEEN MID SPAR AND FRONT SPAR JUST AFT OF 5TH RIVET FROM FRONT SPAR UPPER RIVET ROW. PERFORMED PERMANENT REPAIR TO RIB 11A OF THE LH HORIZONTAL BY MEANS OF REMOVING DAMAGED ANGLES AND FABRICATING AND INSTALLING NEW ANGLES ONTO THE ORIGINAL RIB 11A IAW ETD 2019-107077 REV A. A/C REMAINS IN CHECK.