2020 local RCH-524 C-17 #96-0002 just departed Bangor Eastbound but turning around over Bay of Fundy and looks to be RTB Bangor.
Standing by for Bangor apch.. Listening to: KBGR App/Dep | Bangor, Maine, United States | LiveATC.net
No IFE declared so far so just seems mech or mission scrap.
REACH 524 told Moncton Center on 123.9 that they had an issue with their 'fuel stuff'. They didn't 'declare' an emergency or volunteer any more information to share with the next sector, Boston Center, when asked.