THE ENG QUIT DURING AN ILS APCH DUE TO CARB ICE. PLT WAS ABLE TO RESTART THE ENG AND CONTINUE THE APCH IN IMC TO A SUCCESSFUL LNDG.

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IMC FLT ON VICTOR 16 FROM LONG ISLAND TO RICHMOND; VA; I HAD BEEN FLYING BELOW 6000 FT UNDER MOST OF CLOUDS BUT IN RAIN. NO VISIBLE RIME ICE. ICE LAYER WAS ABOVE 7000 FT. IN PRECIPITATION OFF AND ON FOR 2 HRS AT SAME PWR SETTINGS WITHOUT CARB HEAT (0540 ENG). ABOUT 10 MI TO E APCH VECTORED ME TO ILS APCH AND PUT ME INTO THUNDER CELL OR NEAR CELL IN TOTALLY IMC; LIGHTNING AND SEVERE TURB. NEXT MORNING A FAIRING WAS FOUND MISSING BTWN TAIL AND CABIN TOP. APCH HAD 2 OTHER COMMERCIALS HOLD UNTIL CELLS WENT BY AFTER MY PROBS. I WAS DISORIENTED AND GYROSCOPE WAS NOT CORRECT; LOOKED TO BE 120 DEGS OR SO OFF COMPASS DUE TO SEVERE ATTITUDE CHANGES FROM TURB. I ACTUALLY STARTED APCH 180 DEGS (IE; WENT N VERSUS S TOWARDS ARPT). AFTER DIVERTING TO W I WAS TOLD TO CLB TO 4000 FT. AS I TRIED TO PUT IN CLB PWR ENG STOPPED. I REVERSED THROTTLE TO ORIGINAL POS AND ENG RESTARTED. FULL CARB HEAT STOPPED ENG. A PARTIAL APPLICATION OF CARB HEAT SLOWLY APPLIED SEEMED TO BREAK ICE IN ENG AND EVENTUALLY FULL PWR RESUMED. AT THAT POINT I DIVERTED TO CHESTERFIELD ARPT WHILE 12 MI S WAS VFR. MAJOR ISSUES WERE PLT FATIGUE AND DISORIENTATION ON APCH WHILE BEING PLACED INTO SEVERE TURB. IF APCH HAD COME ACROSS STRONGLY RECOMMENDING A DIVERSION DUE TO THUNDER CELLS; PLT MAY HAVE DIVERTED EARLY AND NOT HAD ISSUES WITH APCH. FLT BRIEFING NEVER INDICATED THUNDER CELLS. MOST OF PROB WAS DUE TO PLT INEXPERIENCE IN HARD IMC AND NOT APPLYING CARB HEAT PERIODICALLY INFLT.