As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, PILOT REPORTED NR 2 ENGINE OVERHEAT LIGHTS CAME ON ONE AFTER THE OTHER. AIRCRAFT LEVELED OFF. NR 2 THROTTLE RETARDED AND OVERHEAT CONDITION DISAPPEARED. AIRCRAFT RETURNED TO DEPARTING AIRPORT AND NORMAL LANDING PERFORMED. INSPECTION REVEALED THAT NOSE COWL ANTI-ICE DUCT'S FORWARD ATTACH B-NUT DESINTEGRATED CAUSING 13TH STAGE BLEED AIR TO HEAT UP THE 'A' AND 'B' LOOPS. MDC S/N 3061 NOT C/W AT THE TIME OF INCIDENT.