As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT WING INTERNAL BETWEEN SPAR II AND SPAR III, A CRACK WAS FOUND AT THE 3RD FASTENER HOLE FROM THE AFT ON THE UPPER FLANGE OF RIB 10, EXTENDING 2 WAYS FROM A FASTENER HOLE. THE TOTAL LENGTH OF THE (2) CRACKS IS APPROX. 0.400". PERFORMED SERVICE BULLETIN 170-57-0047, REPLACING THE EXISTING LT WING RIB. MAJOR REPAIR.