As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING REMOVAL OF TORQUE TUBES, END RIBS FOUND TO BE CRACKED AT RIB/SKIN TO TORQUE ATTACHMENT POINTS AND FORWARD CORNERS OF END RIB. SKIN/RIB DIMPLES THOUGHT TO BE CRACKED DUE TO OVER COUNTERSINKING TORQUE TUBE ASSEMBLY ATTACHMENT POINTS. TORQUE TUBES ONLY COME WITH PILOT HOLES.