As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PIT LH TRANSITION PANEL UPPER AND LOWER SURFACES HAVE CORROSION FROM STA 727G+10 - 787 (MARKED). GROUNDED - YES. REMOVED CORROSION AT AFT PIT LH TRANSITION PANEL STA 727G+10. ORIGINAL THICKNESS .040". REMOVED .010", REMAINING MATERIAL THICKNESS IS .030". FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2. PANEL REPLACED ON TASKCARD G1774079. TOOL# T8224A CAL DUE: 15/JAN/24.