As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT ACC COMPT STA 1190 L17R HOLE CHAFED IN FR OB OF VALVE. CUT OUT DAMAGED AREA 2.5 INCH BY 1 INCH. NO DEFECTS PER NDT SPM 06-10-01.001. FIB FILLER FROM PART NR 9958233-27 AND DOUBLERS FROM.063 7075-T6 PART NR SR09530035-25. INSTALLED YAW DC9 SUM 5304 FIG 4.