As far as I can remember 05:19 Nov 13, 2020
drawings of "parts" (or mechanical assemblies) are called "dessins" / "dessins techniques", not "plans" and certainly not "schéma" which would be a simplified representation.
schéma
nom masculin
1.
Figure donnant une représentation simplifiée et fonctionnelle (d'un objet, d'un processus…).
Schéma d'un moteur.
Similar:
diagramme
2.
Description ou représentation mentale réduite aux traits essentiels.
Voici le schéma de l'opération.
Similar:
esquisse
schème
I doubt you could get away with submitting a mere "schéma" for the purpose of this Export control, even if you could make a "schéma" of just one part.
But then this is was branded a Non-PRO question, surely by people who have done few technical drawings themselves in some previous life ... | 
peer agreement (net): +3