Salut,
The main Air France pilot's Union(in term of members)is the SNPL although there are some others like UNAC,SNPNAC,ALTER........
The adress and contact of the SNPL (I don't know exactly the adress of the Air france branch):
Syndicat National des Pilotes de Ligne
5, rue de la Haye
Bātiment 5
95733 ROISSY CDG Cedex
Tel:+33 (o)1 49 89 24 00
[email protected]
ciao