[mabarker1]

There is still Honeycomb sandwiched between the outer CF layers, right?

[leakinInTheBlueSea]

typically, yes... the 777-200 uses composites in the empennage (tail), fairings and cabin floor... I’d assume honeycomb panels are used at least in the empennage.

[ltc8k6]

I don’t know about that.

I know that AF447’s composite vstab floated because of trapped air.

[ltc8k6]

I just remembered that CFRP is much denser than water.