Code:
sed "s/ \& /_\&_/" /u00/app/oracle/admin/logs/Flatfile.lst | awk '{OFS=",";print $1,$2,$3,$4,$5,$6,"$EAI","$APPLN"}' | tr "_" " "
axrsgpar0335,METTEST,DPC,OUTLN,OPEN,Y,$EAI,$APPLN
axrsgpar0335,METTEST,DPC,SYS,OPEN,N,$EAI,$APPLN
axrsgpar0335,METTEST,DPC,SYSTEM,OPEN,Y,$EAI,$APPLN
axrsgpar0335,METTEST,DPC,SAM,OPEN,N,$EAI,$APPLN
axrsgpar0335,METTEST,DPC,DIP,LOCKED,N,$EAI,$APPLN
axrsgpar0335,METTEST,PPC,DIP,LOCKED,N,$EAI,$APPLN
axrsgpar0335,METTEST,PPC,HIT,OPEN,N,$EAI,$APPLN