As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUL - INTERGRANULAR CORROSION ON LOWER WING SKIN LEFT PRIMARY HEAT EXCHANGER AT STA 3, 4, AND 5, LBL 16 LBL 36. BLENDED OUT CORROSION. FABRICATED REPAIR PLATES PER SRM 57-30-3 AND ESO 11697. INSTALLED REPAIR PER SRM 57-30-3 AND ESO 11697. (X)