Today's Message Index:
----------------------
1. 06:55 AM - Alternator warning light (Bob Steward)
2. 07:10 AM - Re: Alternator warning light (flyv35b)
3. 05:18 PM - Wing damage (David Troup)
4. 06:11 PM - Re: Wing damage (flyv35b)
5. 08:15 PM - Re: Alternator warning light (TeamGrumman@AOL.COM)
6. 08:41 PM - Re: Wing damage (TeamGrumman@AOL.COM)
Message 1
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| Subject: | Alternator warning light |
--> TeamGrumman-List message posted by: Bob Steward <n76lima@mindspring.com>
>1. 11:01 AM - alternator light (TeamGrumman@AOL.COM)
>
>I did an annual on a plane that has an alternator 'low current/low voltage'
>light. This light, unlike the idiot light in 78+ Tigers/Cheetahs (which goes
>out when the alternator switch is turned on) this one only comes on when the
>engine is not running. Once the engine is running, just like a car, the
>idiot
>light goes out.
>
>Any wiring diagrams available for this feature? If so, save me the time to
>research it myself and send it to me.
>
>Thanks
>Gary
Piece of cake. Have done several. Just test your regulator to see if it
is a current sink on the "I" terminal. Turn on the master and then check
for a ground at the I terminal. If so, then you just need a light bulb and
a power source. Provide fused power to the light and ground it through the
I terminal. Some regulators have this terminal disconnected internally.
I've used the optional 3 light annunciator panel out of a Piper Cherokee
series to supply warnings for Alt, Vac and OP. Also happens to provide a
"master nag" so that you have lights on anytime the master is on and the
engine is off.
Bob Steward, A&P IA
Birmingham, AL
Message 2
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| Subject: | Re: Alternator warning light |
--> TeamGrumman-List message posted by: "flyv35b" <flyv35b@ashcreekwireless.com>
How much does the annunciator panel for the Cherokee cost Bob?
Cliff
----- Original Message -----
From: "Bob Steward" <n76lima@mindspring.com>
Subject: TeamGrumman-List: Alternator warning light
> --> TeamGrumman-List message posted by: Bob Steward
> <n76lima@mindspring.com>
>
>
>>1. 11:01 AM - alternator light (TeamGrumman@AOL.COM)
>>
>>I did an annual on a plane that has an alternator 'low current/low
>>voltage'
>>light. This light, unlike the idiot light in 78+ Tigers/Cheetahs (which
>>goes
>>out when the alternator switch is turned on) this one only comes on when
>>the
>>engine is not running. Once the engine is running, just like a car, the
>>idiot
>>light goes out.
>>
>>Any wiring diagrams available for this feature? If so, save me the time
>>to
>>research it myself and send it to me.
>>
>>Thanks
>>Gary
>
> Piece of cake. Have done several. Just test your regulator to see if it
> is a current sink on the "I" terminal. Turn on the master and then check
> for a ground at the I terminal. If so, then you just need a light bulb
> and
> a power source. Provide fused power to the light and ground it through
> the
> I terminal. Some regulators have this terminal disconnected internally.
>
> I've used the optional 3 light annunciator panel out of a Piper Cherokee
> series to supply warnings for Alt, Vac and OP. Also happens to provide a
> "master nag" so that you have lights on anytime the master is on and the
> engine is off.
>
> Bob Steward, A&P IA
> Birmingham, AL
>
>
>
Message 3
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--> TeamGrumman-List message posted by: David Troup <david@troup.net>
Hi Gary,
We met a couple of weeks ago when I stopped by in Auburn to say hi.
Unfortunately, I just learned that one of my partners (there are three
of us that own the Tiger) did something really stupid today and damaged
the plane.
Apparently he forgot to remove the tiedown chain on the right wing, and
tried to taxi out. Predictably, the plane swung around on the axis of
the tiedown ring. He didn't hit anything else, but there's apparently
now a small gap of 1/8" or so on that side that doesn't exist on the
other side. I haven't seen the damage yet so I can't describe it any
better than that. He shut down the plane at that point and did not try
to fly it.
I would assume that the tiedown ring is attached to something sturdy
(like the spar?), and that an occurrence like this could cause some
real damage inside the wing, and that it might be necessary to tear
down some of the wing to inspect for damage... but that's all
speculation on my part. My expectation is that we'll have to have some
inspection done at a shop on the field where we are based (SQL), and if
repairs are necessary, hopefully we could get a ferry permit to bring
the plane to you for those (unless they are really minor.) The shop on
our field is pretty good, but they don't know anything about Grummans
and so I'd prefer not to use them for anything complicated.
I thought I'd ask you if you've seen the aftermath of this kind of
incident before, and if you have any suggestions on what would need to
be torn down or inspected to determine what the extent of damage was
(if any) and whether the plane was safe to ferry.
I realize I'm not giving you much data to work with (I'm going to try
to get some digital photos) but if you have any experience with this
kind of thing, any comments would be appreciated.
I'm going to copy this to the list in case anyone else has any thoughts
to weigh in with. No need for editorializing on the accident itself -
obviously my partner did a stupid thing and needs some refresher
training on the concept of a preflight inspection.
-David Troup
Tiger N28797 (SQL)
Message 4
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--> TeamGrumman-List message posted by: "flyv35b" <flyv35b@ashcreekwireless.com>
David, I just happen to have a Tiger in my shop with the wing tips off right
now so I took a look at the attachment details to refresh my memory.
You probably bent the wing skin and the steel bracket that attaches the
nutplate (that the tiedown eye screws into) to the spar. The skin can most
likely be straightened and the bracket can either be straightened or
replaced of it is cracked or broken. Doesn't sound like to big a deal and
the plane most likely is flyable and maybe even airworthy to fly without a
ferry permit.
Cliff A&P/IA
Message 5
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| Subject: | Re: Alternator warning light |
--> TeamGrumman-List message posted by: TeamGrumman@aol.com
In a message dated 4/5/05 8:14:27 AM, n76lima@mindspring.com writes:
> Piece of cake.=A0 Have done several.=A0 Just test your regulator to see if it
> is a current sink on the "I" terminal.=A0 Turn on the master and then check
> for a ground at the I terminal.=A0 If so, then you just need a light bulb=20and
> a power source.=A0 Provide fused power to the light and ground it through=20the
> I terminal.=A0 Some regulators have this terminal disconnected internally.
>
>
It had the Zeftronics V15V00 regulator. The wiring diagram for the
Zeftronics shows wiring from the I to the Alt Field for the over voltage and master
nag, but no diagraom for the current idiot light. It sounds like what you
are saying is the same except for picking a different fuse. ????
Message 6
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--> TeamGrumman-List message posted by: TeamGrumman@aol.com
In a message dated 4/5/05 5:19:48 PM, david@troup.net writes:
> He didn't hit anything else, but there's apparently
> now a small gap of 1/8" or so on that side that doesn't exist on the
> other side.=A0
>
Digital photos would be nice. Where is the 1/8 inch gap? Yes, the
tie-down ring is attached to the spar. Now ....
If he accelerated away from a tie-down fast enough bend the spar and not
notice he was still tied-down, he shouldn't be flying. He's way too careless
to
be flying.
In the first place, there are other planes tied-down nearby. With enough
throttle to bend the spar, he's blowing debris all over the other planes.
Second, debris on the ground under the prop will damage the prop when it's picked
up. Nothing more than barely enough throttle to get the plane to just start
moving should ever be used to pull out of a parking place.
My two-cents worth.
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