find duplicates and copy row

[Melrose0507]

I have a spreadsheet with a lot of different data. In columns AR:AX which indicates days of the week there is either a "Y" or "N". I want to do a couple of steps.
1. identify lines that have more than one Y.
2. copy entire line to end of sheet.
3. In new line, change the first Y to N leaving remaining Ys alone.
4. Go back to the row below the line just copied from and continue to look.

I do not need to delete any Y's on original lines as other formulas will only look for the first Y in the row.

I am looking for a macro to do this. I am having troubling researching the correct formulas. Any assistance is greatly appreciated.

Thanks in advance.