As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD PIT L/H TRANSITION HAS AREAS OF CORROSION STA 500D TO STA 500I. GROUNDED - YES. FWD PIT L/H TRANSITION CORROSION FOUND OUT OF LIMITS FROM 500D TO 500Z IAW B737-800 SRM 53-30-53-01-2 REPAIRED TRANSITION IAW B737-800 SRM 53-00-53-2R-5.W= 1" O= .040" R= .032 L= 1" D= .008".