What was found
LT IB, RT IB, AND LT OB INTERCOSTALS BETWEEN FS 394-FS 409 AFT OF AVIONICS BAY DOOR SHOWING SIGNS OF CORROSION. REPLACED LT IB P/N SH670-32075-4, RT IB P/N SH670-32075-3 , AND LT OB P/N SH670-32077-4 INTERCOSTALS IAW SRM 51-40-11, 53-21-23, 51-42-21, 51-25-01, AND 51-42-06.