Why is it "difficult to get approval" and what is this " more complex technology"? The thrust of my column is that sailplanes that were airworthy when their use was 'paused' (ha) 17 months ago are still not airworthy.
For the removal of all doubt, the Viking T.1 AKA Grob G103 Twin Acro is a pure sailplane. It does not have an engine, flaps or a retractable undercarriage.
So with regard to returning them to service (and with the best will in the world) - just how hard can it be?