As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE EXHAUST TAILPIPE HAS A 16 INCH CRACK AT THE 6 OCLOCK POSITION NEAR THE ACOUSTIC PANEL. *S/D* THE CAUSE OF THE CRACKING IS STILL UNDER INVESTIGATION WITH THE MANUFACTURE OF THE TAILPIPE. THE TAILPIPES HAVE BEEN MODIFIED BY A STC FOR THE STAGE 3 HUSHKIT REQUIREMENTS. THE CORRECTIVE ACTION IS THE WELDING OF THE CRACKS PER THE MM 70-78-34-05.