Ideally all 3 aircraft should linked to each other, as they are same airframe carrying different registry over time.
There's a problem here: Our site distinguish an airframe by manufacturer/model and c/n. However, on FAA site, N9903Z and N4999E has different model, N9903Z is AF-853 and N4999E is AF835.
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=9903Z
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=4999E
Our weekly import script will screw up every week no matter how to fix it, by creating different profiles for both aircraft.
This is a tough one. Need to think about it.
Ken