Well, not really "maintenance".
Air France will finally keep 7 B744 PAX in service until 2018 and so has decided last year to revamp completely the interior.
F-GITD went first to AMS
during 9 weeks for this complete renovation with the installation of new seats in Y and J, PTVs in all classes with the last brand new Panasonic IFA AVOD system, etc ... etc ...
went back to service on May 12 on CDG
F-GITF is in AMS
for the same reason until mid-june. F-GITE & F-GEXB will follow until Nov. 2012.