As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBSERVED THE CARRY THRU SPAR CORROSION WHEN LOOKING AT THE AIRCRAFT. THIS ITEM HAD SURFACE CORROSION THAT HAS BLISTERING THAT COULD BE PICKED AT AND MOST OF THE SURFACE AREA HAD WHITE DUSTING AND DISCOLORATION INDICATING CORROSION THAT REQUIRES TREATMENT. CAUSE IS PROBABLY FROM EXPOSURE TO OUTSIDE STORAGE.