As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE REPLACING STRINGER 39L AT STA 1307, STRINGER SECTION WAS OVER 24 INCHES REQUIRING THE FRAME AT STA 1307 TO BE SEVERED ALONG THE WEB PORTION VERTICALLY BETWEEN STR 38L AND 39L. THE OUTER FAIL-SAFE CHORD WAS SEVERED VERTICALLY BETWEEN STR 36L AND 37L AND AGAIN BETWEEN 39R AND 38R. REPAIRED WEB AND FAIL-SAFE CHORDS UNDER ENGINEERING AUTHORITY B767-53-007366.