Does anyone else print the briefing pack on A5 paper? (no i don't mean 2 up on A4)- I mean genuine a5 paper.)
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‌When I try doing this although the PDF it generates looks great on the iPhone/ipad preview  (where you then select the air print printer),the physical print doesn't start until a third down the paper so chops all the bottom off your plog, weather, notams or charts etc etc. 
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‌I've tried all the appropriate printer settings for a5 and my printer has the latest drivers/firmware. I have no problem printing a5 from any other app where supported or indeed a PC or MAC -it's  just the SD app that throws roughly a third of the page before starting printing. 
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‌I wondered if extraneous  postscript LF or similar codes were being thrown to the printer that the screen PDF render ignores (hence it looks fine on iPhone/ipad SCREEN) but the printer executes faithfully. No amount of me playing with settings has resolved this.
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‌thanks
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Done some more investigation as I hated the idea of having to email myself the  Brief and then get my desktop PC up and running just to print it out.
‌There is a third party iOS app - Printer Pro which "allegedly" bypasses AirPrint and uses it's own print services software. When I export the Briefing PDF from SD to this app, it prints out just fine - phew!
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‌So the problem may seem to be either iOS print services (but as I said I have other apps that print A5 fine via AirPrint) or some how when SD calls the iOS create PDF service,  AirPrint doesn't like something it finds.