As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING REPLACEMENT OF LT WING IB LEADING EDGE, AN APPROX 12-INCH CRACK IN LOWER SPAR FLANGE WAS DISCLOSED. THE CRACKED SPAR FLANGE PIECE FOLLOWED THE LEADING EDGE DURING REMOVAL. LOCATION, YW 136.30 TO YW 157.875. THE CRACKED SPAR FLANGE PIECE IS BEING RETURNED TO MFG FOR EVALUATION.