My fellow simmers...is there any way or program I can use to list AI flight plans in order by AC number ...any sugestions are welcome Thanks

If you import the flightplans.txt file into Excel, you can sort on any column you'd like. Older versions of Excel (pre Windows 95) will only support 16K lines, not big enough for even the default flightplans.txt file, but the newer versions go up to at least 64K lines.