[BubbaJunebug]

Carbon fiber already makes up part of the 777 that has already been flying. Horizontal/Vertical tail, about 9-10% of the total 777 gross weight

[Jorge]

Carbon fiber already makes up part of the 777 that has already been flying.

Yes and I beleive they recently did the first 10+ year inspection of a 777, completely disassembled, and found the carbon composites including floor supports to all be in pristine condition.