List all heavy aircraft

Although most heavy flights properly file their flight plans with the correct prefix of “H”, it’s also probable that sometimes it omitted accidentally by whoever files the flight plan.

If you’re interested in those aircraft types, you can use SearchBirdseyeInFlight with something like:

“{= dest KIAH} {aircraftType {B788 B77W B763 B762 B772 B773 B789 A124 A225 IL76}} {true inAir}”