Hi all, unsure if this is allowed on here but I work for a collection of vintage aircraft. We have a YAK-3UA that we are fixing some leaks on the pitot static system, however we are having some trouble getting it to hold vacuum, does anyone on here happen to poses any old workshop manuals for the 3? more specifically the testing/construction of the pitot head. We don’t and unfortunately its not readily available online, thanks everyone
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