Actually, the term trunk goes back almost a century, before FedEx existed. FedEx has just co-opted the term for themselves, which I thought was silly when I first heard it used here (hence the reason why I put trunk in parenthesis). The term trunk referred to the original dozen or so airlines in the 30s. At least that’s what I learned from my college air transportation class three decades ago. So to use it now just for our 777 is even more bastardized. Anyway, if you go to the flight schedule page, it has two options, trunk and feeder. And feeder doesn’t refer to 757s and 767s or A300s.