As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT GROUNDED FOR C-23 CHECK. IN ACCOMPLISHMENT OF TASK CARD ATI-53-552-01-01 DOT 14 DOT 045 UNDERNEATH WASTE TANK VAVLE AT FS 1540-1582 BETWEEN STRINGER 37L AND 37R CORROSION OUT OF LIMITS ON STRINGER 37R AT STATION 1540. REPAIRED STRINGER 37R ON BS 1540 TO 1582 IAW B767-200 SRM 53-00-03.