I think you'll find that the PW 206B2 and the Arrius 2B2 give a very similar performance with the 135. Most notable being a higher performance 30 second OEI, although I did hear that PW were having some problems with this. Neither will be certified for the 135 until at least the summer of 2002. In the meantime Turbomeca have an interim 2B1A TU45 which gives 2835 kgs helipad at ISA +5(no 30 second OEI though) whereas the 2B2 gives the same but up to ISA +10. PW don't have such a good interim giving either AUW up to 2630 or 2720 dependant on certification time. Hope this helps!
[This message has been edited by Marco (edited 16 March 2001).]