Narrative:

On initial climb out I observed the number 1 engine overheat; with the egt gauge turning yellow then red. I told the first officer to tell ATC we are leveling off at 4;000 ft. As soon as I applied the appropriate checklist steps the engine immediately cooled off and matched the number 2 engine egt. At the same time I had a flight attendant look out the window at the number 1 engine to see if there was anything glaring. She said no.we declared an emergency; turned back; and descended towards ZZZ. We reviewed the QRH for engine overheat; and single engine land; and did the normal descent check list items; even though the engine was fine at power settings below full climb thrust. We informed dispatch via the ACARS diversion page. We made a normal landing; stopped on the runway; and had the fire department look us over. They gave us the thumbs up and I then requested that they follow us to the gate.

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Original NASA ASRS Text

Title: A commercial jet flight crew declared an emergency and diverted to a nearby airport following receipt of an engine overtemperature warning on initial climb out.

Narrative: On initial climb out I observed the number 1 engine overheat; with the EGT gauge turning yellow then red. I told the First Officer to tell ATC we are leveling off at 4;000 FT. As soon as I applied the appropriate checklist steps the engine immediately cooled off and matched the number 2 Engine EGT. At the same time I had a Flight Attendant look out the window at the number 1 engine to see if there was anything glaring. She said no.We declared an emergency; turned back; and descended towards ZZZ. We reviewed the QRH for Engine Overheat; and Single Engine Land; and did the Normal Descent Check List Items; even though the engine was fine at power settings below full climb thrust. We informed Dispatch via the ACARS Diversion Page. We made a normal landing; stopped on the runway; and had the Fire Department look us over. They gave us the thumbs up and I then requested that they follow us to the gate.

Data retrieved from NASA's ASRS site as of April 2012 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.