Purely from memory, I think the A300 has conventional (dural?) structures for the fin and tailplane. The A310 (1982/3) was, I think, the first Airbus to employ major composite structure; the fin is composite (made in Spain?). A similar fin may be used on the A300-600, which was contemporary with the A310. The A320 may take it one step further, as I think it has composite fin and tailplane. The A330/340 certainly have composite fins; not sure about the tailplane, err.. THS.
All the above is off the top of my head, and needs verification and/or amplification.
PS
Also purely from memory, the A300-600R was the first to use a tailplane fuel-tank, followed by the A310-300. But I suspect their tailplanes were made of conventional materials.
Last edited by Jetdriver; 1st May 2011 at 00:39.