As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SEVERAL AREAS OF WRINKLES AND OIL CANNING WERE FOUND IN THE FUSELAGE CANOPY ROOF SKIN BETWEEN FRAME 12 AND 14.NO HEAVY LANDINGS OR UNUSUAL INCIDENTS REPORTED.THIS IS SECOND AIRCRAFT FOUND WITH PROBLEM. SUBSEQUENT FINDINGS SHOWED NO SIGNIFICANT VARIATIONS ON THE MATERIAL CONDUCTIVITY READINGS OR THICKNESS MEASUREMENT FROM THOSE OF THE DRAWING REQUIREMENTS.