What was found
FWD CARGO TRANSITION PANEL HAS CORROSION AT NUT PLATES, BOTTOM SIDE, BS 500D, LBL 24. ACFT GROUNDED. REMOVED TRANSITION PANEL ZEE SECTION FROM BS 500C+5 TO 500D AND REMOVED NUTPLATES FROM SECTION IAW SRM 51-40-02. BLENDED CORROSION IN THE 15" X 5" SECTION AND REMOVED .007" ORIGINAL THICKNESS .040 AND REMAINING MATERIAL .033 WHICH IS OUT OF LIMITS IAW SRM 53-00-53-1A-2. USED NEW TRANSITION PANEL MATERIAL TO FABRICATE NEW TRANSITION PANEL ZEE SECTION IAW SRM 53-00-53-2R-5. APPLIED ALODINE & PRIMER TO NEWLY FABRICATED PARTS AND INSTALLED NEW PART, TRANSITION PANEL ZEE SUPPORT SECTION, BS 500C+5 TO 500D) AS REQUIRED IAW SRM 53-00-53-2R-5, DOT REMOVED NR B837 .