>And is there any known way to prevent water ingress / moisture ingress >into the pitot and static lines?
No, short of plumbing flow-thru desiccant cartridges into the pitot/static lines. Military A/C generally have "T" fittings at all the low points with the base of the "T" pointing down and capped off. The caps are painted yellow. That serves a mini trap and reservoir to collect water and/or debris and should be checked at least every 100 hour/annual. I actually found a (dead) housefly in perfect shape in a pitot trap once, I assume it crawled into the tube in the hanger. Some helos, H-3's for one, (and I suppose some starched wing A/C) that spend a lot of time over water add a 1" stub of tubing to increase the size of the reservoir. Allen G. Wiesner KR-2SS/TD S/N 1118 65 Franklin Street Ansonia, CT 06401-1240 (203) 732-0508 flash...@usadatanet.net