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 AREAS OF LEVEL 2 CORROSION ALONG STRINGER 17R FROM FRAME 15 TO 23 WITH A MAXIMUM DEPTH OF .010 INCH. THE STRINGER WILL NEED TO BE INSTALLED IN SECTIONS WITH REPAIR SLICES. THIS WILL RESULT IN A MAJOR REPAIR. (M)