As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C WAS EN ROUTE TO ORD FROM TYS WHEN CREW GOT A MESSAGE "BLEED 2 OVERTEMP" DURING CLIMBOUT. A/C RETURNED TO TYS AND EXCHANGED PLANE WITH A/C124. MAINTENACE REMOVED AND REPLACED THE NR 2 PRECOOLER IAW EMB 145XR AMM 36-11-04. OPS CHECK AND LEAK CHECK GOOD AND WAS RELEASED. ON LOGPAGE 2756199.