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.