As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE D-CHECK INSPECTION, CORROSION WAS FOUND ON THE RUDDER FRONT SPAR WEB DOUBLERS AT STATION ZR 163. REPAIR ACCOMPLISHED REMOVAL OF DAMAGED DOUBLERS, FABRICATION AND INSTALLATION OF TWO NEW DOUBLERS IN ACCORDANCE WITH FAA DER APPROVED DRAWING C88-R13 AND ENGINEERING ORDER 27-DC8-758.