They unwashed masses used to call us fitters or riggers it wasn't until later that we were called technicians. To that thought/end there was a very,very funny "old airforce"
ditty about Mortis was a rigger, Vulcan was a metal basher, Leonardo Da Vinci was an A/C refinisher, Hero was a fitter (A/C engine tech) and you checked for altitude with a rope and lead weight ( it came back with blood on it you knew you were over a town ).
So "grease monkey" was for ground bound people not the elite. it amazes me how nicknames/terms have changed Gay, Sick, Punk etc back in the day some of the things people say now could get your lights punched out quickly. Mind you I suppose now teenagers posting naked or worse things on the net gives you an idea of how morals/taste/language have slipped over the years. I'm not calling it down, just saying things are changing.
Bill the demon