Narrative:

About 70 mi south of sdf, told by ATC to turn left for traffic. Aircraft was mostly on top of clouds, in and out, radar on with tilt about minus 1.0 degrees down. No returns on screen. Aircraft, flown by captain, turned left to new heading of 350 degrees off course. After on new heading, almost immediately in severe turbulence. Seat belt light and sign already on due to being in light chop. Aircraft angle of bank plus or minus 20 degrees, altitude plus or minus 100 ft. Autoplt disconnected. Captain took control and maintained wings level. After about 10 second, aircraft came into clear but immediately right back in severe turbulence. During first turbulence encounter, first officer selected ignition to override. Immediately after clearing second turbulence encounter, captain noticed right engine egt extremely high (720 degrees C) with N1 and N2 rolled back. Engine had flamed out and aircraft was losing altitude (assigned FL350). Right engine secured using appropriate checklist. First officer could not talk to ATC due to numerous radio calls on frequency. ATC contacted us before we could contact them to tell us to maintain FL350. We were already descending through 34500 ft unable to maintain assigned altitude. We immediately declared an emergency, got clearance to lower altitude, and requested direct to sdf. We could see sdf was clear. An uneventful single engine descent, approach and landing were accomplished. Emergency equipment was on station at sdf. No injuries on aircraft due to seat belt sign having been on previous to severe turbulence encounter.

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Original NASA ASRS Text

Title: MD88 ACFT. ENCOUNTERED SEVERE TURB AT CRUISE ALT FOLLOWED BY ENG FLAMEOUT. FLC DECLARED EMER AND DIVERTED TO A CLOSE ARPT WITH UNEVENTFUL LNDG.

Narrative: ABOUT 70 MI S OF SDF, TOLD BY ATC TO TURN L FOR TFC. ACFT WAS MOSTLY ON TOP OF CLOUDS, IN AND OUT, RADAR ON WITH TILT ABOUT MINUS 1.0 DEGS DOWN. NO RETURNS ON SCREEN. ACFT, FLOWN BY CAPT, TURNED L TO NEW HDG OF 350 DEGS OFF COURSE. AFTER ON NEW HEADING, ALMOST IMMEDIATELY IN SEVERE TURB. SEAT BELT LIGHT AND SIGN ALREADY ON DUE TO BEING IN LIGHT CHOP. ACFT ANGLE OF BANK PLUS OR MINUS 20 DEGS, ALT PLUS OR MINUS 100 FT. AUTOPLT DISCONNECTED. CAPT TOOK CTL AND MAINTAINED WINGS LEVEL. AFTER ABOUT 10 SECOND, ACFT CAME INTO CLR BUT IMMEDIATELY RIGHT BACK IN SEVERE TURB. DURING FIRST TURB ENCOUNTER, FO SELECTED IGNITION TO OVERRIDE. IMMEDIATELY AFTER CLRING SECOND TURB ENCOUNTER, CAPT NOTICED R ENG EGT EXTREMELY HIGH (720 DEGS C) WITH N1 AND N2 ROLLED BACK. ENG HAD FLAMED OUT AND ACFT WAS LOSING ALT (ASSIGNED FL350). R ENG SECURED USING APPROPRIATE CHKLIST. FO COULD NOT TALK TO ATC DUE TO NUMEROUS RADIO CALLS ON FREQ. ATC CONTACTED US BEFORE WE COULD CONTACT THEM TO TELL US TO MAINTAIN FL350. WE WERE ALREADY DSNDING THROUGH 34500 FT UNABLE TO MAINTAIN ASSIGNED ALT. WE IMMEDIATELY DECLARED AN EMER, GOT CLRNC TO LOWER ALT, AND REQUESTED DIRECT TO SDF. WE COULD SEE SDF WAS CLR. AN UNEVENTFUL SINGLE ENG DSCNT, APCH AND LNDG WERE ACCOMPLISHED. EMER EQUIP WAS ON STATION AT SDF. NO INJURIES ON ACFT DUE TO SEAT BELT SIGN HAVING BEEN ON PREVIOUS TO SEVERE TURB ENCOUNTER.

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.