sunnuntai 6. tammikuuta 2019 6.29.34 UTC+2 George Haeh kirjoitti:
We are refurbishing and have the spoilers off, but so far have not seen a way to remove the arms and pushrods.

Any hints or special tools?

Don't know about Grob but in all cases I'm aware of airbrake linkages and bearings are installed before closing the wing. This means that you need a hole saw to change parts.