Looks like a holding pattern. An odd one. Perhaps mechanical failure and waiting on ground resources? One could try to find their radio here comms here [1].

Looks like a holding pattern. An odd one. Perhaps mechanical failure and waiting on ground resources? One could try to find their radio here comms here [1]. Maybe KBOS Final Vector, Tower and Boston Center / Guard [1] - https://www.liveatc.net/search/?icao=kbos https://www.liveatc.net/search/?icao=kbos