As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT STAIRWELL BS 1266 VERT TORQUE BOX WEB IS CRACKED ON LIGHTENING HOLE. ROUTED OUT DAMAGED AREA .3" X .3750" IAW SRM 51-10-1, REV 102. FABRICATED REPAIR DOUBLER USING 7075 T-6 .032", DIM 1" X 4" IAW SRM 53-10-2, FIG 6 AND 51-40-2 FIG 1. INSTALLED REPAIR DOUBLER IAW SRM 51-30-2.