flight_airframes

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Which airframes have been heard operating this airline flight, how often and when -- from Airside Labs' own ADS-B receiver? Accepts a flight in any common form: BA49, BAW49, "BA 49", VS105. Returns each airframe heard broadcasting that Flight ID within the receiver's footprint, with its Mode-S address, registration and ICAO type (joined from the registrations dataset), how many receiver poll cycles it was in view for, over how many distinct days, and first and last heard. `most_seen` and `most_recent` name the likeliest next tail; `types_seen` lists every type that has flown it, and where there is exactly one the resolved type is embedded with its capacity block. Why this matters: the cabin, the seat map and the sub-fleet vary by REGISTRATION, not by type. Two A330-900s at one airline can be different aircraft inside. A seat-finding or fleet-watching agent needs the tail, and this is the only place it comes from observation rather than a schedule. Coverage is the station's footprint: about 180 nm, which takes in Heathrow and Gatwick traffic and the westbound Heathrow departure flow. `not_heard` means exactly that -- the flight did not cross the footprint in the window, or did not fly -- and says nothing about whether the flight exists. This is what was observed, not a prediction: an airline swaps tails without notice, and the answer's confidence describes the strength of the observation (many sightings over many days), never the odds for a future date. Do NOT use it to assert what will operate a flight; say what has operated it.