As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK CREW REPORTED LT ENG EGT INCREASED UNTIL JUST BELOW MINIMUM LIMIT. EMER DECLARED FLIGHT RETURNED JFK LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. FOUND LT ENG EGT FOUND TO BE IN LIMITS BUT RT ENG EGT WAS LOWER THAN REQUIRED. REPLACED RT ENG 1 THRU 4 EGT PROBES & ENG JUNCTION BOX. SYS GND CHECKED NORMAL, OPERATION CLOSED.