As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE RIGHT DUCT OVERTEMP LIGHT ILLUMINATED. CREW CLOSED RIGHT BLEED PUT IN AUTO MODE, REFERRED TO QRH, RECYCLED TEMP SELECT AUTO MODE AND RIGHT BLEED CLOSED AGAIN. AIRCRAFT RETURNED TO MSP. MAINTENANCE REPLACED THE RIGHT HEAT EXCHANGER AND RIGHT COMPRESSOR DISCHARGE OVERTEMP SWITCH (PN 67121-52-440) IAW SF340MM 21-61-00. OPS CHECKS GOOD.