Thrust reversers
Redeye--
Yes, I believe it DOES change the performance calculations, I.E. the amount of runway required for takeoff/landing if you select the thrust reversers as INOP in the MEL section of the OPC.
Feel free to PM me if you'd like more info so as to avoid the cheap pot shots on this forum. I can check out our OPC when I go to work and pass on any info you need. Take care!
S.B.