As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION OF RIGHT WING, A CRACK WAS FOUND ON THE AFT SIDE OF THE FORWARD WOOD SPAR, 79 INCHES OUTBOARD FROM THE BUTT RIB. THE 5 INCH LONG, HORIZONTAL CRACK WAS LOCATED AT THE COMPRESSION MEMBER AND RAN THROUGH THE HOLES FOR THE DRAG WIRES. UNDETERMINED CAUSE.