What was found
LT WING LOWER PLANK WS 0.00 STRINGER 5 & 7 WING DRAIN ATTACHMENT HOLES, FWD & AFT CRACK INDICATIONS NOTED. C-CHECK SERVICE BULLETIN 601R-57-045, REVISION A, WINGS LOWER AFT WING PLANK. REMOVAL OF THE FASTENER HOLES FOR THE FUEL BOOST PUMP & THE DRAIN VALVE ASSEMBLY, PART A, & PART B INCORPORATED.