As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND LT WING RIB CRACK AT 3RD FASTENER HOLE TO UPPER SKIN. MX STOP DRILLED CRACK IAW ETD 2011-170/03013 MAJOR REPAIR, TRANSFERRED TO LOG BOOK PAGE 260857 -2&-3 FCS AFFECTED 57-10-00-003. A/C REMAINS IN CMH FOR COMPLETION.