As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H TRANSITION HAS MULTIPLE AREAS OF CORROSION FROM STA 727 TO 847. GROUNDED - YES. REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2. REMOVED AND REPLACED L/H TRANSITION FROM STA 727 TO 847 IAW B737-800 SRM 53-00-53-2R-5 REPAIR 5W= 5" O= .040" R= .031" L= 2" D= .009".