What was found
AFT PIT - BS 1640 S27L, DRILL MARKS IN STRINGER (4 EACH HOLES) BLENDED DRILL MARKS ON STRINGER 27L IAW SRM 53-00-03. FOUND TO BE OUT OF LIMITS IAW SRM 53-00-03, FIG 101, SHEET 1. NO HOLES ALLOWED. REMOVED DAMAGE IAW SRM 53-00-03, FIG 201. FABRICATED REPAIR HAT SECTION. FABRICATED FILLER IAW SRM 53-00-03, FIG 201. TREATED AND PRIMED REPAIR HAT AND FILLER IAW SRM 51-20-01. INSTALLED REPAIR HAT AND FILLER ON S27L AT BS 1640 IAW SRM 53-00-03, FIG 201.