Talking of JAL, the Fryliner which diverted back to BOS on the 18th remains at BOS and has not operated since; a suggestiion that it was perhaps more than the 'precautionary' return reported at the time..?
From the perspective of
PR., I'd expect Boeing to have been all over this aircraft to have it back in the air a.s.a.p., yet 5 days on, she's still on the ground @ BOS.