As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE HEAVY CHECK, INSPECTION FOUND CORROSION ALONG 6 OF THE AFT AIRSTAIR RISERS. FABRICATION OF PARTS WAS NECESSARY DO TO LENGTH IN LEAD TIME FROM BOEING. THE RISERS WHERE REPLACED WITH RISERS FABRICTED USING FLIGHT VEHICLES INC REPAIR SKETCH 52-98515-3. THEN AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)