As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON ALC INTERCOSTAL UPPER CHORD UNDER TRANSITION PANEL STA 1540-1560 STR 27L. FOUND ON AGING AIRCRAFT INSPECTION. REF AMES NR 172653-0100-0248 SEE PARTIAL WORK SHEET #144 PAGE 1OF1 REPLACED UPPER CHORD INTERCOSTAL P/N 146N545OU17 BATCH RC-1025 0 95 TAG 3913854 AT STR 27L BTW STA 1540 TO STA 1560 IAW B757-200 SRM 51-40-02-06-0 PAR 1 AND 7.