As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 5135 DCA - BNA. AT START OF DESCENT HAD 14TH STAGE DUCT FAIL MSG ON EICAS. PERFORMED EMER 6-4 CHECKLIST, SHUTDOWN NR 1 ENG AND DIVERTED TO TYS. INSPECTED L 14TH STAGE BLEED AIR DUCT SYSTEM. NO LOOSE CONNECTIONS OR EVIDENCE OF ANY LEAKS NOTED IAW MM 36-12-04. PERFORMED TEST OF BLEED AIR SYSTEM IAW MM 36-21-00. SYSTEM TESTED GOOD. GROUND RAN ENGINES WITH CREW, NO ABNORMAL INDICATIONS NOTED.