As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INTERCOSTAL AT STA 747-767 CORRODED LOWER SURFACE AT NUTPLATES JUST BELOW STR 26 R/H. GROUNDED - YES. BLENDED CORROSION ON INTERCOSTAL REMAING MAT FOUND OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2 REMOVED AND REPLACED INTERCOSTAL IAW B737-900 SRM 51-40-02-0G-0W=0.5 O=0.032 R=0.020 L=1 D=0.012.