Larry DeCamp
Well Known Member
My Pmags are powered from the main buss ( master switch). To check internal gen function, I assured 1,000 RPM, switch off the master and listen, then turn on the master. This reboots any functions already powered from the master
There are numerous options offered here on VAF for switches and push buttons to interrupt power for this confirmation, and most draw some objection for complexity, additional single point failure etc.
A wise contract pilot suggested to me after I discovered a dead mag at run up before take-off, that he did mag checks taxing to the hanger so he knew in advance of "show time", if maintenance was required. So I have amended my protocol, hope this is useful:
Radios,avionics etc off.
1,000 or more RPM for you 100LL fans to clean the plugs.
Master off
Mag check
Mixture cutoff
There are numerous options offered here on VAF for switches and push buttons to interrupt power for this confirmation, and most draw some objection for complexity, additional single point failure etc.
A wise contract pilot suggested to me after I discovered a dead mag at run up before take-off, that he did mag checks taxing to the hanger so he knew in advance of "show time", if maintenance was required. So I have amended my protocol, hope this is useful:
Radios,avionics etc off.
1,000 or more RPM for you 100LL fans to clean the plugs.
Master off
Mag check
Mixture cutoff