REFLECTOR: Nose Gear Microswitch

[Michael Watson]

Hi John,

The switch is closed when the light is on. 12 volts is supplied to the
switch through the lamp, closing the switch (gear down and locked) completes
the
circuit to ground turning on the lamp.  The test button acts as a ground for
all 3 lamps. Since that works, I'd say you have bad (intermittent) grounds
to
the switch connections.

BTW: Don't you carry a 12" metal rod to slide through the keel under the
nose wheel shocks. It prevents a collapse if the over center is not locked,
or the
Tower tells you that the gear is down but the light is off.

Good Luck,

On Sat, Aug 6, 2011 at 12:51 PM, <aminetech at bluefrog.com> wrote:

> After lowering my gear for landing a few days ago, the nose gear indicator
> light did not come on.  I asked the tower to check and he said the gear was
> down, but he had no way to tell if it was all the way down.  I retracted and
> went around.  The sun was on the panel during final.  Downwind I lowered the
> gear and with the sun gone I could see that the nose light was dimly lit, so
> I decided to take a chance.  On short final the gear warning light came on
> (not the nose light, but a separate light that comes on if either the nose
> or mains are not down), so I held my breath and was relieved when all was
> OK.  I had recently adjusted the nose gear and switch.  I did it with the
> normal weight on the nose gear.  I thought that maybe the overcenter linkage
> might move down a bit with no weight, so I checked and that was the case.
> So I adjusted the switch to compensate for this.  When I checked the lights,
> the nose gear light was on, but 2 main gear lights were out.  I pressed the
> test button and all 3 came on.  When I released it, they all stayed on.  So
> I replaced the keel cover and checked the lights again.  This time the nose
> gear light was out.  It came on with the test button, but went back out when
> I released it.  I'm going to check the microswitch, although I think it's
> OK.  Is the switch circuit open or closed when the green light is on?  Any
> ideas of what else to check?
>
> Thanks,
>
> John
>
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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS HX Synthetic Vision
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