I thought this quote was interesting:
"So we'll be looking at the things that we'd normally look at... So it'd be great to go after an advanced [rotor] blade," he added. "And so we're monitoring some commercial developments that we see out there and we'll probably be looking at those in the future."
Boeing flew the composite High Performance Rotor Blade back in 2013 with the intention of fitting it to the Block II MELB. It must not be working out as planned, as it sounds like they will look to other composite 500 blades available, like Van Horn and HTC.
500 Fan..