What was found
CRACKED/TORN DOUBLER ON TAIL CONE FRAME AT STATION YN2164, LEFT HAND UPPER DOWER PIN AREA. REMOVED EXISTING DOUBLER AND INTERCOSTAL IAW MD10 SRM 51-35-01 VOL II. STOP DRILLED CRACK IAW MD10 SRM 53-30-00 VOL I. PERFORMED HFEC TO VERIFY CRACK ENDS AT STOP DRILL IAW NDT SPM 01-10-01- 001. FABRICATED NEW DOUBLER AND INSTALLED ALONG WITH INTERCOSTAL IAW MD10 SRM 53-30-00 PAGE 11 AND EA 8-5352-83943, TAILCONE, FRAME CRACK AT Y2165 AND MD10SRM 51-33-01. REFERENCE NONROUTINE N00864.