What was found
STRINGER 25P CORRODED, FWD PAX DOOR UNDERFLOOR. PERFORMED CUTOUT OF LOWER MAIN SILL, STR 25P FROM FS X1.00 TO FS X32.40, REF TC 6-53-1160-FWD PAX DR ITEM 17. C/W ET INSP ON STR 25P CUT LINES REF NDTM PT1 51-00-06. NO DEFECTS NOTED. FABRICATED NEW LOWER MAIN SILL SECTION, STR 25P FOR MCD LOWER SURROUND IAW SRM 53-20-17, REPAIR-2, FIG 201, SHEET 2 AND LOCATED AND DRILLED FASTENER HOLES IAW SRM 51-40-017. USED STR 85329349-101 PO 1788. FABRICATED 4-OFF EXTERNAL REPAIR DOUBLERS OUT OF 2024T-3 .063 PO T00020092 AND DRILLED FASTENER HOLES ON DOUBLERS AND SKIN REF SRM 53-20-17, REPAIR-02 PROCEDURE 7F AND G AND FIG 201, SHEET 3 AND 4. REPAIRED THE EXISTING FASTENER COUNTERSINKS REMAINING IN THE SKIN UNDERNEATH THE EXTERNAL REPAIR DOUBLERS, MCD LOWER SURROUND, REF SRM 51-18-00 STRUCTURE IDENT-08. INSTALLED 4-OFF EXTERNAL REPAIR DOUBLERS IAW SRM 53-20-17 REPAIR-02, FIG 201. INSTALLED NEW LOWER MAIN SILL SECTION STR 25P BETWEEN X1.00 AND X32.40 REF SRM 53-20-17, REPAIR-02, FIG 201 AND DWG 85329330 RELEASE P, REV-A.