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Engine Start (Electrical system off)

Asked by: 1588 views ,
Aircraft Systems, General Aviation, Student Pilot

All we know that's necessary the avionics power switch must be OFF during engine start to prevent possible damage to the avionics and also before to cutoff the engines. Technically speaking, why? Regards.

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1 Answers



  1. John D Collins on Oct 08, 2013

    With modern avionics I don’t think this is necessary. It is a precaution to protect against low voltage and high voltage spikes that older avionics didn’t handle well. With an avionics master switch, it is no big deal.

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