Rearrange the text file

Gents,

I have a large file and each line of the file contains more than 200 bytes.Please let me a way to have the new line to start when the word "FIT" appears.

I was trialling with 'tr' command but i am not sure how to get it based on bytes and so it wasn't working...

 
Current file
-----------
 
FITH020611080PVERSION 05                                                        FITD06042410     035319N86203980506C   YNYNNN                       NNNNNNNN4112FITD042001
050913N84001990715C   YNNNNN                       NNNNNNNN1404FIT
 
Required format
---------------
 
FITH020611080PVERSION 05                                                        
FITD06042410     035319N86203980506C   YNYNNN                       NNNNNNNN4112
FITD042001050913N84001990715C   YNNNNN                       NNNNNNNN1404
FIT

Something like this,

sed 's/FIT/\nFIT/g' inputfile

@pravin27

NNNNNNNN4112FITD042001 need be connected to next line.

awk '{printf $0}' infile |sed 's/FIT/\nFIT/g'
sed 's/FIT/\nFIT/2g'