As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE SCHEDULED MAINTENANCE, A CRACK WAS DISCOVERED APPROX 6.5" LONG IN A U-SHAPED PATTERN ON THE LT WING MAIN SPAR AT LT CWS 51.00 TO CWS 48.00, EMANATING FROM THE UPLOCK BRACKET ATTACHMENT POINT TO THE MAIN SPAR. THE UPLOCK BRACKETS WERE ALSO BROKEN AND BENT INDICATING POSSIBLE FORCE FROM MAIN GEAR EXTENSION, NOT CORROSION WERE THE CAUSE OF DAMAGE.