What was found
WHILE PREPPING AFT CARGO AREA FOR INSULATION FOUND CORROSION 6" LONG ON TEE CAP AT FRAME 66 & -Y140. REMOVED CORROSION ON TEE CAP AND FOUND TO BE OUT OF LIMITS IAW SRM 51-74-10, PAGE 204, PARA 5 AND SRM 53-10-15, FIG 106. R & R TEE CAP IAW SRM 51-40-21.