As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE DOUBLERS ON THE BOTTOM OF THE WING WALK SKINS JUST OUTBOARD OF THE INBOARD STAMPED STIFFENERS WERE SEVERELY CRACKED. THE AFT SKIN CRACK WAS 42CM IN LENGTH. THE FORWARD SKIN HAD 3 CRACKS 5CM IN LENGTH. THIS AREA IS NOT NORMALLY ACCESSIBLE BUT THIS AIRCRAFT HAD AN EXTRA INSPECTION HOLE INSTALLED FROM A PREVIOUS SB. THIS AREA SHOULD BE INSPECTED WITH A BORESCOPE ESPECIALLY ON HIGHER TIME AIRCRAFT.