As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: CORROSION APU TORQUE BOX LEFT HAND SIDE LOWER CHORD FROM STA 1092 TO STA 1102 AT S14L. REPAIRED PER EA 361169. ENGINEERING REVIEWED THIS EVENT AND DETERMINED THE CORRECT CORROSION LEVEL WAS LEVEL 2 NOT LEVEL 1. SECTION 7 CORROSION LEVEL FIELD WAS CORRECTED ACCORDINGLY.**