|Quoting threeifbyair (Reply 1):|
How about the good old guess and check method?
If you have some time on your hands, get a list of all the OH CR7 registrations (or just use the Airliners photo search engine and note the registrations) and search each one in the "Private Flight Tracker" search box on FlightAware. Then just check to see where that plane flew on the 21st. Although it is somewhat inefficient, you should be able to get your registration eventually.
I can rule out N669CA - I tested that registration, but it flew RDU-BOS-DCA-BOS-JFK on the 21st.
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