What was found
AFT WET AREA RH FLOOR SUPPORT AT STA 947-967 RBL50 HAS CORROSION. GROUNDED - YES. REMOVED DAMAGE I.A.W. B737-900ER SRM 51-10-02, INTERCOSTAL FOUND OUT OF LIMITS, ORIGINAL THICKNESS AT DAMAGE LOCATION .200, REMAINING THICKNESS .070 PER BAC DWG 147A5660 REV-AND I.A.W. B737-900ER SRM 53-70-51-1A-1, REMOVED INTERCOSTAL I.A.W. B737-900ER SRM 51-40-02, LOCATED, DRILLED AND INSTALLED NEW INTERCOSTAL P/N 147A5660U22 P.O. 1124142.1 PER BAC DWG 147A5650 REV B AND I.A.W. B737-900ER SRM 51-40-05 & 51-40-02.