According to Mr Boeings 744 DDG if two CMC's are fitted, either (only one ) may be unserviceable ( no remarks or exceptions ).
Not sure if there are any single CMC installations out there, but if there were, I would guess at a L/H installation.
Maybe our resident 747 expert QAVION can explain further
GR
Last edited by Golden Rivet; 30th May 2003 at 02:18.