@_NaokiSaito At the end of the day, there's no right or wrong using "ei" or "ah" because native or proficient english speakers will understand you just fine.
@_NaokiSaito The rise of the United States as a dominant force in media and popular culture also adds to the complexity of the subject because there are differentce in accents smong states due to its local population and dominant immigrant population.
@macchiMC72 I did not know some of these manual illustrations were printed with the Germanic Gothic script. That's actually pretty interesting because most aircraft manuals use upper-case block lettering as the standard.
@airmainengineer Allowable limits set by the maintenance manual are not negotiable, or the part is not airworthy. You don't sign off on work that is not backed by established procedures. Different areas have different allowances for damage / repair, and the difference can be quite substantial.
@paranormal_2ch Zion national park, Utah, United States. This tunnel was built in 1930s as part of Roosevelt's New Deal program. All hand carved with chisel. I was there in 2018.