Narrative:

At FL330, 45 mi northeast orf, engine #1 overheat light illuminated. Per QRH (SOP) engine thrust was reduced on #1 engine to idle, over heat light extinguished. Operated engine at idle thrust, emergency was declared due to inability to maintain cruise altitude. Requested vectors to orf where an uneventful flaps 15 degree landing was accomplished.

Google
 

Original NASA ASRS Text

Title: B737-300 CREW RPTED #1 ENG OVERHEAT LIGHT ILLUMINATED. THE CREW DECLARED AN EMER AND LANDED AT THE NEAREST SUITABLE ARPT.

Narrative: AT FL330, 45 MI NE ORF, ENG #1 OVERHEAT LIGHT ILLUMINATED. PER QRH (SOP) ENG THRUST WAS REDUCED ON #1 ENG TO IDLE, OVER HEAT LIGHT EXTINGUISHED. OPERATED ENG AT IDLE THRUST, EMER WAS DECLARED DUE TO INABILITY TO MAINTAIN CRUISE ALT. REQUESTED VECTORS TO ORF WHERE AN UNEVENTFUL FLAPS 15 DEG LNDG WAS ACCOMPLISHED.

Data retrieved from NASA's ASRS site as of July 2007 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.