As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MULTIPLE BLENDED CORROSION AREAS TO AFT UPPER WING PLANK (DWG: CC670-10042, REF) BETWEEN WS353.00 - WS387.50, RHS. MINIMUM REMAINING THICKNESS IS 4.53MM [0.I78 ] OUT OF 0.200 +/-0.005 NOMINAL, REF, AND 2.25MM [0.089 ] OUT OF 0.100 +/-0.005 NOMINAL,