A lot of KLM Cityhopper's Fokker 70s are either undergoing, or due major maintenance checks (hence them having 3 or 4 aircraft on short-term lease), and what with the Fokker 100s going tech so often, there's a lack of replacement aircraft, so services are being cancelled.
The question I would be asking is, is it just our services getting cancelled, or are several services being effected?