What was found
VISUAL INSPECTION DURING "A-CHECK" (WITH FLASHLIGHT) REVEALED LARGE CRACK IN CIRCUMFERENCE OF EXHAUST UNIT INNER CONE. CLOSER INSPECTION (CRAWLED UP JET-PIPE) INDICATED APPROX, 2/3 OF INNER CONE CIRCUMFERENCE CRACKED. DAMAGED AREA NORMALLY RESTS WITHIN 1/8 - 1/4 INCH OF 3 STAGE TURBINE BLADES/BLADE KEEPERS. ENGINE REMOVED AS A GEL, EXHAUST UNIT REPLACED WITH SERVICEABLE PART, ENGINE REINSTALLED. STATIC AND FUNCTION CHECKS COMPLETED.