Narrative:

We were in cruise at FL390 when an EICAS caution message appeared stating right engine overheat. As captain; I xferred the flight duties to my first officer. Using the QRH checklist; I followed procedures and after retarding the right thrust lever to idle; the caution light went out and the EICAS message disappeared. I left the right engine at idle for the remainder of the flight. I declared an emergency with ATC; gave the flight attendants the information; decided to divert to ZZZ; advised dispatch of our problem and diversion decision; contacted ZZZ operations and advised of our diversion and set up for a single engine landing. I told the flight attendants to not prepare the cabin. I advised ZZZ approach to have the crash fire rescue equipment equipment to be called out. I took back control of flying duties from the first officer and the landing was uneventful. After exiting the runway; I canceled the emergency; shut down the right engine and taxied to the gate. I wrote up the problem in the logbook. I conferred with dispatch and maintenance personnel.

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Original NASA ASRS Text

Title: B757-200 'RIGHT ENG OVERHEAT' DISPLAYED ON EICAS. THRUST WAS REDUCED TO IDLE AND FLT CREW DECLARED AN EMER AND DIVERTED.

Narrative: WE WERE IN CRUISE AT FL390 WHEN AN EICAS CAUTION MESSAGE APPEARED STATING R ENG OVERHEAT. AS CAPT; I XFERRED THE FLT DUTIES TO MY FO. USING THE QRH CHKLIST; I FOLLOWED PROCS AND AFTER RETARDING THE R THRUST LEVER TO IDLE; THE CAUTION LIGHT WENT OUT AND THE EICAS MESSAGE DISAPPEARED. I LEFT THE R ENG AT IDLE FOR THE REMAINDER OF THE FLT. I DECLARED AN EMER WITH ATC; GAVE THE FLT ATTENDANTS THE INFO; DECIDED TO DIVERT TO ZZZ; ADVISED DISPATCH OF OUR PROB AND DIVERSION DECISION; CONTACTED ZZZ OPS AND ADVISED OF OUR DIVERSION AND SET UP FOR A SINGLE ENG LNDG. I TOLD THE FLT ATTENDANTS TO NOT PREPARE THE CABIN. I ADVISED ZZZ APCH TO HAVE THE CFR EQUIP TO BE CALLED OUT. I TOOK BACK CTL OF FLYING DUTIES FROM THE FO AND THE LNDG WAS UNEVENTFUL. AFTER EXITING THE RWY; I CANCELED THE EMER; SHUT DOWN THE R ENG AND TAXIED TO THE GATE. I WROTE UP THE PROB IN THE LOGBOOK. I CONFERRED WITH DISPATCH AND MAINT PERSONNEL.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.