In the process of updating the AMP I’ve run into some confusion regarding the rules surrounding the ASI/ALT. I can’t find anything in CAP 562 that covers the subject so can only think that something’s been deleted since my AMP was drawn up. As this was about ten years back it’s quite likely.
Having scoured the CAA and EASA websites I can’t find any reference to the requirement to calibrate the instruments on a biennial basis and would like to ask if anyone knows where the ruling is (if it still exists).
Thanks in advance.

