The recommendation to shut off avionics during engine start is based on an
Old Wives Tale. Click on the link to see what Bob Nuckolls had to say about how that rumor got started. There is no voltage spike during engine start. There is a voltage drop or brownout that does not harm modern avionics. Although brownouts did harm avionics back in the 1960s.
Old Wives Tale. Click on the link to see what Bob Nuckolls had to say about how that rumor got started. There is no voltage spike during engine start. There is a voltage drop or brownout that does not harm modern avionics. Although brownouts did harm avionics back in the 1960s.