SA226 PLT STRIKES PWR LINES DURING ILS APCH TO BTR.

Narrative

AS I APCHED THE BATON ROUGE AREA; THE CTLR ADVISED ME THAT I WOULD BE VECTORED FOR THE ILS APCH TO RWY 13. I SELECTED THE APPROPRIATE FREQ FOR LOC AND OM AND IDENTED THEM. UPON INTERCEPTING THE LOC; I SELECTED APCH ON THE FLT DIRECTOR MODE SELECT. THE APCH AND GS LIGHT ILLUMINATED. I SELECTED 300 FT ON THE RADAR ALTIMETER. AS THE ACFT INTERCEPTED THE GS; I ESTABLISHED 130 KTS AIRSPD AND APPROX 700 FPM DSCNT RATE. EVERYTHING APPEARED NORMAL AT THAT TIME. AT ABOUT 600 FT MSL; THE L SIDE GS INDICATOR BEGAN TO FLUCTUATE AND THEN WENT FULL SCALE UP IMMEDIATELY. AT THAT TIME; THE COMMAND BARS AND THE LOC INDICATED EVERYTHING NORMAL. I WAS TRYING TO ANALYZE THE PROB WHEN THE RADAR ALTIMETER LIGHT ILLUMINATED; INDICATING THE ACFT WAS 300 FT AGL. I THEN LOOKED UP AND GLIMPSED WHAT I PERCEIVED TO BE THE LEAD IN LIGHTS. AT THAT TIME; I LOOKED DOWN AT THE FLT DIRECTOR AND LOC AND THEY APPEARED NORMAL. I THEN LOOKED BACK TO SEE IF I COULD LOCATE THE RWY. AT THAT TIME; I SAW WHAT I BELIEVED TO BE PWR LINES. I IMMEDIATELY INITIATED A PWR-ON; CLBING; L TURN TO AVOID THE PWR LINES. THERE WAS A LARGE BLUE FLASH OF LIGHT. DUE TO THE FLASH OF LIGHT; I SUSPECTED THAT THE ACFT HAD CONTACTED THE PWR LINES. I NOTIFIED THE CTLR AT THAT TIME. I DETERMINED THAT THE ACFT WAS FLYING AND HANDLING CORRECTLY; AND THAT I WOULD GO AROUND FOR ANOTHER ATTEMPT AT THE ILS RWY 13 AND SHOULD THAT FAIL; WE SHOULD MAKE ARRANGEMENTS TO GO SOMEWHERE ELSE. ON THE NEXT ATTEMPT; I COMPLETED THE APCH AND LANDED. AFTER LNDG; THE FAA INSPECTORS DETERMINED THAT THERE WAS NO DAMAGE TO THE ACFT OR PWR LINES.