Changing cockpit bulbs
Guys,
Are there any regulations that either allow or prohibit the changing of cockpit bulbs? I am after the advice for the changing of undercarraige indication filaments and the square push buttons. I did it all my career but have had a recent discussion where younger pilots refuse to do it.
In part M I can only find reference to owner pilots, not to professional chaps on CAT.
Thank you in advance
MM