German language - but you guys surely know what they are doing 
In short form: QEC, tank out, main spar x-rayed, prop torqued, some faulty rivets new, all hydraulic lines new, etc.
View: https://www.youtube.com/watch?v=Vtlp_fF34cI
In short form: QEC, tank out, main spar x-rayed, prop torqued, some faulty rivets new, all hydraulic lines new, etc.
View: https://www.youtube.com/watch?v=Vtlp_fF34cI
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