As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAD - RIGHT EICAS AND SECONDARY EXHAUST GAS TEMPERATURE INDICATION FLUCTUATING TO FULL SCALE DEFLECTION. FLIGHT RETURNED MAD LANDED WITHOUT INCIDENT. FOUND MISALIGNED CONNECTOR (9 O`CLOCK POS) ON EGT JUNCTION BOX. CLEANED AND RE-SECURED JUNCTION BOX CONNECTORS. DURING IDLE RUN BY CREW ALL INDICATIONS NORMAL AND STABLE. SYSTEM GROUND CHECK NORMAL OPERATION.