JSAG wrote:Thanks for making this clearer.
So is he implying that if I get no mag drop at start up but no cut , proceed to power checks where still no mag drop will mean no fly?
And is likely it will recover at power checks?
With respect, you seem to be guessing at why you are fl icking those switches. (ha ha, fl icking without the space gets donked!)
You need to remind yourself what is going on behind those switches; what the mags are doing, and what the switches are doing when you switch off the mags.
Run through in your mind the logic of what the situation could be after you have started the engine:
1. The engine may have started happily on one mag and you haven't noticed yet (let's ignore the fact for now that one or more of the plugs could be playing up), for one of these reasons (there could be others):
a) One mag is not functioning.
b) A 'P' lead has shorted to the airframe.
c) A switch has failed permanently to the 'Off' condition (irrespective of whether you can move it or not).
2. The engine has started on two mags, but one mag (or both) is permanently on (and probably was before you started the engine, making it dangerous to have moved the propeller):
a) A 'P' lead has broken.
b) A mag switch is permanently open circuit (irrespective of whether you can move it or not).
Now run through in your head what you would expect (and why) to happen when you operate each switch in ALL the scenarios above. An early mag check should identify the existence of a problem (but not necessary the cause) before continuing with everything else.