Join Date: Dec 2008
Location: Mostly living in the basement
Programs: Free Agent Level 2; MR LT(!)TE, HH SE, ALL SE, BAC Silver, DL MM, UA PS, 2V Fanboi, CBP GE
Posts: 5,347
The 767 placard says 10lb IIRC, though maybe it varies by type of 767? I've definitely stowed stuff there for takeoff, but it's not great as things have a tendency to slide.
The 75S footwells are tiny, so even if you take something down from the OHB after takeoff there's not a ton of space to leave it. The 75S pretty much never runs out of OHB in J (unlike in Y, where it always runs out), though sometimes the people near you have too much stuff and you have to use the bins a row back.