>Gentleman,
>If I can put my 2 cents in... The ACS Gerdes ignition switch is a great
>switch but.... there is an AD on the switch and I would comply with the
>AD if I were installing the switch in my airplane... It may help you
>from making an emergency landing.
>Bryan Files
>Ever Fly Maintenance
>Palmer, Alaska
The AD against that switch is for replacment of the
starter switch contacts and addition of a DIODE
across the switch contacts . . . or one can add
the diode across the starter contactor coil
as shown in all of our wiring diagrams.
If you have a new switch of any age, it's just fine.
You need to be sure there's an arc suppression
diode or MOV in the sytem to keep the switch
contacts from burning on the starter contacts
only. In any case, there are NO effects on the
magneto switching. If you have an switch already
installed, but NO diode on your starter contactor,
and the start function is working okay, don't
fiddle with the switch and simply add the diode.
I don't understand why the Feds made this
fix an AD . . . the probability of creating an
inflight hazard is somewhere between very tiny
and zero.
If you haven't purchased an ignition switch,
consider using two toggles and a push button
to control mags and starter. It's less expensive,
the switches look like they belong on the panel
with all the other switches and you won't find
yourself strapped in with the key still in your
pocket. Key switches are a minor inconvenience
to someone who wants to steal your airplane.
Recall that once you have two engines, no TC
airplane has a ring of keys dangling from the
panel in flight much less two. You get inside
the door on a twin and you've got the airplane
(assuming you know how to fly it).
The expense, panel space and inconveniences of
a keyswitch are easily traded away with what
has to be an infintesimal increase in the risk
of theft.
Bob . . .
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