Correct, SFOJFK.
Whatever they don't have in terms of spares or replacements, they either manufacture themselves or contract out for someone else to manufacture. (Edited to clarify this statement.)
To use an example from the post above, the landing gear is 100% aluminum, but BF Goodrich have made replacement OEM gear for the ships which is 100% steel.
The 717/F100 debate has already been discussed in another thread.
Studley
[This message has been edited by studley (edited 01-11-2002).]