Today's Message Index:
----------------------
1. 12:27 AM - quick reaction (Mark Jefferies YAK UK)
2. 05:39 AM - Scraping the T-3A Firefly... (Jeff Linebaugh)
3. 05:50 AM - Re: No Guts No Glory.....can someone host the file (David McGirt)
4. 06:05 AM - Re: Scraping the T-3A Firefly... (A. Dennis Savarese)
5. 06:14 AM - Re: No Guts No Glory.....can someone host the file (Roger Kemp)
6. 06:27 AM - Re: quick reaction (Mike Beresford)
7. 06:49 AM - Re: Scraping the T-3A Firefly... (Stephen Fox)
8. 07:01 AM - Re: Scraping the T-3A Firefly... (Scooter)
9. 08:36 AM - Re: Scraping the T-3A Firefly... (Roger Kemp)
10. 08:48 AM - Re: Re: Scraping the T-3A Firefly... (Roger Kemp)
11. 09:16 AM - Re: Yak-50 Electrical System Troubleshooting (Roger Kemp)
12. 09:35 AM - Re: Yak-50 Electrical System Troubleshooting (Mike Bell)
13. 10:09 AM - Re: Re: Yak-50 Electrical System Troubleshooting (Roger Kemp)
14. 12:30 PM - No Guts, No Glory is now available as a download.....Enjoy. (Tim Gagnon)
15. 02:53 PM - Houston Area Yak owners... (Tim Gagnon)
16. 03:29 PM - Re: Re: Yak-50 Electrical System Troubleshooting (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
Message 1
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Nr2 guy from the aero-gp who managed to zoom and jump.
Mark Jefferies for YAK UK Ltd <http://www.yakuk.com>
Lt Gransden Airfield <http://www.yakuk.com/egmj.asp>
Sandy, Beds
SG19 3BP - England
Conditions of <http://www.yakuk.com/cob.doc> business
00 44 1767 651 156 ph
00 44 1767 651 157 fx
00 44 7785 538 317 mob
Message 2
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| Subject: | Scraping the T-3A Firefly... |
Scrap Aluminum price? The T-3A is a fiberglass airplane! Taint much
aluminum in it! Wonder who is getting taken?
Jeff Linebaugh
jefflinebaugh@earthlink.net
Time: 07:12:26 PM PST US
From: "Terry Lewis" <talew@bellsouth.net>
Subject: Yak-List: scrap
I found on google that the airforce academy will scrap all T-3A Firefly
aircraft and will get scrap aluminum price for each.
A pity.
Terry
Message 3
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| Subject: | No Guts No Glory.....can someone host the file |
--> Yak-List message posted by: "David McGirt" <david@mcgirt.net>
Someone send it to me, I have plenty of bandwidth..
david@mcgirt.net
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Tim Gagnon
Sent: Wednesday, September 13, 2006 11:38 PM
Subject: Yak-List: No Guts No Glory.....can someone host the file
--> Yak-List message posted by: "Tim Gagnon" <NiftyYak50@msn.com>
I have had a pretty good response of my offer and realized that some email
cannot handle a file this size..it is over 8mb.
Is there someone who can post the file on a site and make it available for
download? I will try a friends site but figured someone here is smarter than
I am with computers....
I do have the list of names who have emailed me...Jay Land..your was deleted
from some reason, please resend.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=61512#61512
Message 4
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| Subject: | Re: Scraping the T-3A Firefly... |
I think it was T-34's. I may be wrong though.
Dennis
----- Original Message -----
From: Jeff Linebaugh
To: yak-list@matronics. com
Sent: Thursday, September 14, 2006 7:38 AM
Subject: Yak-List: Scraping the T-3A Firefly...
Scrap Aluminum price.? The T-3A is a "fiberglass" airplane! 'Taint
much aluminum in it! Wonder who is getting taken?
Jeff Linebaugh
jefflinebaugh@earthlink.net
Time: 07:12:26 PM PST US
From: "Terry Lewis" <talew@bellsouth.net>
Subject: Yak-List: scrap
I found on google that the airforce academy will scrap all T-3A
Firefly
aircraft and will get scrap aluminum price for each.
A pity.
Terry
Message 5
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| Subject: | No Guts No Glory.....can someone host the file |
--> Yak-List message posted by: "Roger Kemp" <viperdoc@mindspring.com>
Dave "Talon" McGirt has that computer savy to do this...I think.?
Doc
> [Original Message]
> From: Tim Gagnon <NiftyYak50@msn.com>
> To: <yak-list@matronics.com>
> Date: 9/13/2006 10:42:53 PM
> Subject: Yak-List: No Guts No Glory.....can someone host the file
>
> --> Yak-List message posted by: "Tim Gagnon" <NiftyYak50@msn.com>
>
> I have had a pretty good response of my offer and realized that some
email cannot handle a file this size..it is over 8mb.
>
> Is there someone who can post the file on a site and make it available
for download? I will try a friends site but figured someone here is smarter
than I am with computers....
>
> I do have the list of names who have emailed me...Jay Land..your was
deleted from some reason, please resend.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=61512#61512
>
>
Message 6
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| Subject: | Re: quick reaction |
--> Yak-List message posted by: Mike Beresford <mike_beresford@yahoo.co.uk>
Hi all
Mark, I had a look at the video on BBC, and the Extra
was out of the frame during the actual bail-out. Do
you know exactly how he got it right? it looked as
though he did a steep climb immediately after impact
(intentional?), and may have been able to use the time
get unstrapped, open canopy etc. If he was able to get
a few hundred extra feet, it may have made a very big
difference.
Blue skies
Mike Beresford
--- Mark Jefferies YAK UK <mj@yakuk.com> wrote:
> Nr2 guy from the aero-gp who managed to zoom and
> jump.
>
>
>
> Mark Jefferies for YAK UK Ltd <http://www.yakuk.com>
>
>
> Lt Gransden Airfield <http://www.yakuk.com/egmj.asp>
>
>
> Sandy, Beds
>
> SG19 3BP - England
>
> Conditions of <http://www.yakuk.com/cob.doc>
> business
>
> 00 44 1767 651 156 ph
>
> 00 44 1767 651 157 fx
>
> 00 44 7785 538 317 mob
>
>
>
>
___________________________________________________________
All new Yahoo! Mail "The new Interface is stunning in its simplicity and ease of
use." - PC Magazine
http://uk.docs.yahoo.com/nowyoucan.html
Message 7
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| Subject: | Re: Scraping the T-3A Firefly... |
I was also under the impression the T-3A has been grounded for the
past several years do to engine failure issues
Steve
On Sep 14, 2006, at 9:04 AM, A. Dennis Savarese wrote:
> I think it was T-34's. I may be wrong though.
> Dennis
>
> ----- Original Message -----
> From: Jeff Linebaugh
> To: yak-list@matronics. com
> Sent: Thursday, September 14, 2006 7:38 AM
> Subject: Yak-List: Scraping the T-3A Firefly...
>
> Scrap Aluminum price=85? The T-3A is a =93fiberglass=94 airplane!
=91Taint
> much aluminum in it! Wonder who is getting taken?
>
>
> Jeff Linebaugh
>
> jefflinebaugh@earthlink.net
>
>
> Time: 07:12:26 PM PST US
>
> From: "Terry Lewis" <talew@bellsouth.net>
>
> Subject: Yak-List: scrap
>
>
> I found on google that the airforce academy will scrap all T-3A
> Firefly
>
> aircraft and will get scrap aluminum price for each.
>
> A pity.
>
> Terry
>
>
> .com/Navigator?Yak-List
> ========================
> ========================
the
> ========================
> ========================
>
Message 8
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| Subject: | Re: Scraping the T-3A Firefly... |
--> Yak-List message posted by: "Scooter" <yakk52@verizon.net>
I believe it is all composite...
Here's the history:
"The T-3A is the newest version of Slingsby Aviation's T-67 Firefly line of military
training aircraft. The prototype began flying in the summer of 1991, and
the Air Force accepted delivery in February 1994. Of the total fleet of 110 T-3s
which originally cost $32 million, 57 were stationed with the Air Force Academy's
557th Flying Training Squadron in Colorado Springs, with another 53 with
the 3rd Flying Training Squadron in Hondo, Texas. Final assembly of the British-made
T-3 was done in Hondo by Northrup Grumman.
The Air Education and Training Command at Randolph AFB announced on 12 October
1999 that the T-3A Firefly would be dropped by the Air Force, after having been
grounded for more than two years. In 1998 the Air Force intiated the privately
run Introductory Flight Training which uses private flight schools to screen
pilot candidates. The success of this program persuaded the Air Force to drop
the T-3 from service. The T-3 fleet was grounded in July 1997, following an
inexplicable engine failure in Colorado. Three instructors and three students
were killed in crashes since the plane went into service in 1994. Two crashes
were the result of pilot error, while a third occurred because of a stall condition
from which the pilot was unable to recover. The predecessor T-41 had no
fatal accidents in 30 years of flight, although the T-41 was incapable of performing
the aerobatics and spins that were the hallmark of the T-3. The T-3's engine
had failed 66 times at takeoff or landing, and the Air Force grounded 57
of the planes on 10 occasions due to problems with the engines, fuel systems
and brakes."
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=61569#61569
Message 9
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| Subject: | Re: Scraping the T-3A Firefly... |
It is the T3A Firefly that has been grounded for about 4 years now and is being
scrapped. Do find it interesting that some doofus in materials salvage actually
approved scraping a fiberglass aircraft for the aluminum! The instruments they
will pull out of them are worth more than the amount of aluminum they will
get out them!
Doc
----- Original Message -----
From: A. Dennis Savarese
Sent: 9/14/2006 8:13:22 AM
Subject: Re: Yak-List: Scraping the T-3A Firefly...
I think it was T-34's. I may be wrong though.
Dennis
----- Original Message -----
From: Jeff Linebaugh
Sent: Thursday, September 14, 2006 7:38 AM
Subject: Yak-List: Scraping the T-3A Firefly...
Scrap Aluminum price? The T-3A is a fiberglass airplane! Taint much aluminum in
it! Wonder who is getting taken?
Jeff Linebaugh
jefflinebaugh@earthlink.net
Time: 07:12:26 PM PST US
From: "Terry Lewis" <talew@bellsouth.net>
Subject: Yak-List: scrap
I found on google that the airforce academy will scrap all T-3A Firefly
aircraft and will get scrap aluminum price for each.
A pity.
Terry
.com/Navigator?Yak-List
Message 10
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| Subject: | Re: Scraping the T-3A Firefly... |
--> Yak-List message posted by: "Roger Kemp" <viperdoc@mindspring.com>
Bottom line..they just need to get the good ol' reliable YAK-52
(ok...ok..add a few of the bent wings too...CJ'S!). Just to give them the
experience of a slow snap roll!
Doc
> [Original Message]
> From: Scooter <yakk52@verizon.net>
> To: <yak-list@matronics.com>
> Date: 9/14/2006 9:14:53 AM
> Subject: Yak-List: Re: Scraping the T-3A Firefly...
>
> --> Yak-List message posted by: "Scooter" <yakk52@verizon.net>
>
> I believe it is all composite...
>
> Here's the history:
>
> "The T-3A is the newest version of Slingsby Aviation's T-67 Firefly line
of military training aircraft. The prototype began flying in the summer of
1991, and the Air Force accepted delivery in February 1994. Of the total
fleet of 110 T-3s which originally cost $32 million, 57 were stationed with
the Air Force Academy's 557th Flying Training Squadron in Colorado Springs,
with another 53 with the 3rd Flying Training Squadron in Hondo, Texas.
Final assembly of the British-made T-3 was done in Hondo by Northrup
Grumman.
>
> The Air Education and Training Command at Randolph AFB announced on 12
October 1999 that the T-3A Firefly would be dropped by the Air Force, after
having been grounded for more than two years. In 1998 the Air Force
intiated the privately run Introductory Flight Training which uses private
flight schools to screen pilot candidates. The success of this program
persuaded the Air Force to drop the T-3 from service. The T-3 fleet was
grounded in July 1997, following an inexplicable engine failure in
Colorado. Three instructors and three students were killed in crashes since
the plane went into service in 1994. Two crashes were the result of pilot
error, while a third occurred because of a stall condition from which the
pilot was unable to recover. The predecessor T-41 had no fatal accidents in
30 years of flight, although the T-41 was incapable of performing the
aerobatics and spins that were the hallmark of the T-3. The T-3's engine
had failed 66 times at takeoff or landing, and!
> the Air Force grounded 57 of the planes on 10 occasions due to problems
with the engines, fuel systems and brakes."
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=61569#61569
>
>
Message 11
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| Subject: | Yak-50 Electrical System Troubleshooting |
Cliff,
Here is a emial version that is the same as the hardcopy that I have. Hope it helps.
Doc
----- Original Message -----
From: netmaster15@juno.com
Sent: 9/13/2006 11:21:27 PM
Subject: RE: Yak-List: Yak-50 Electrical System Troubleshooting
Doc,
I would be most appreciative if you would fax me a wiring diagram of the electrical
system. My fax is : 1 828 321 0878. Thankyou.
Cliff
-- "Roger Kemp" <viperdoc@mindspring.com> wrote:
--> Yak-List message posted by: "Roger Kemp" <viperdoc@mindspring.com>
Good discription Mark, I am not an electrician/avionics guy by any sense of
the word. Took in physics and remember a thimb full. I will send you the
wiring diagram I currently have courtesy of Tim Gagnon. Credit be given
where due. Send me a fax # offline and when I get back to the office
tomorrow.
Doc
> [Original Message]
> From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mark.bitterlich@navy.mil>.
> To: <yak-list@matronics.com>
> Date: 9/12/2006 4:18:49 PM
> Subject: RE: Yak-List: Yak-50 Electrical System Troubleshooting
>
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
>
>
> Harry, I do not have a 50 electrical diagram (Doc if you have one, I'd
> dearly love to get a copy), but I have traced out a lot of it, and most
> of what I have seen duplicates the 52 in many ways. I am going to need
> the full electrical diagram to help you out further, but I have a lot of
> comments to make here. Also, please excuse my lack of tact, I am an
> EA-6B Avionics Tech Rep by profession and I work on problems like this
> ALL the time. There are a few general rules that you always go by when
> dealing with this type of nonsense.
>
> A. Always suspect what was last worked on as the FIRST place you should
> look for a problem. If human hands have recently been involved anywhere
> near wiring, and you now have an electrical problem that you never had
> before... GO WHERE PEOPLE RECENTLY PUT THEIR HANDS AND LOOK THERE FIRST.
> You'd be amazed at how often that rule is ignored out of simple ego, but
> boy is it accurate!
>
> B. If you are dealing with a system of wires, switches, lights, etc.,
> always suspect any part that moves, like switches, as being the first
> thing you check for failure.
>
> C. NEVER EVER reset a circuit breaker more than once if it pops. You
> NEVER, EVER EVER troubleshoot a problem like this by pulling this wire,
> or that wire, and then turning on the breaker again to see if it pops.
> There are many reasons for this, but the most obvious is that you can
> easily end up starting an electrical fire, and please keep in mind where
> the fuel tanks are in your YAK-50. For example, let's say a wire was
> arcing out against your fuel tank. Not hard to imagine since it is only
> inches away from your wiring. Each time you reset that breaker you get
> an ARC. Eventually the arc actually cuts a hole in the tank and now you
> have gas fumes adding into the mess. Explosion, fire, you name it. You
> can also generate a wiring fire, even without gas involved. Bottom
> line, stop doing that and never do it again... Please. Anyone that says
> I am wrong in this regard is an idiot.... Avoid them.
>
> Ok. So you now ask... How do I troubleshoot this problem WITHOUT doing
> that? The answer requires you to have a grasp of the basics of
> electrically, which you admitted that you do not have, but here we go, I
> am going to teach you one trick now and anyone else who bothers to read
> this.
>
> You did exactly the right thing when you took the wires off the circuit
> breaker/switch. You need to get an electrical meter and learn how to
> read DC VOLTS with it. It's pretty easy. Set it to DC VOLTS, hook the
> black wire to aircraft ground (any good bonding point in the aircraft
> itself to the frame) and then use the red wire to touch a wire and read
> voltage. Turn on your electrical master.. The one marked BATTERY. Now
> look at the switch going to the gear. With the switch turned off, one
> side will have 28 volts on it, and the other side will have NO volts on
> it. The side with NO volts on it will be the one we want to mess with
> first. In this case, you have already done that part... You have
> located a wire that if you pull it off, it stops the problem. Luckily
> nothing that we know of blew up in the process. God loves you.
>
> What you need to do now is to learn how to troubleshoot to the next
> step. One good way to accomplish this is by rigging the aircraft so
> that it limits the current draw to this wire. The wire that you found
> is going to a short circuit, and that is why the breaker is popping.
> You need to locate some 28 volt light bulbs. If you do not have any, I
> will send you some. Let me know. You get about a 25 watt bulb rated at
> 28 volts (again, I will be glad to give you as many as you need). You
> solder two wires to this light bulb. Now, hook one wire of the bulb (it
> does not matter which one) to the terminal on the switch. Hook the
> other wire soldered to the light bulb to the wire that you have hanging
> that used to connect to the switch.
>
> Now when you turn on your switch, your light bulb will come on, because
> you have a short to ground in the aircraft wiring SOMEPLACE. But the
> circuit breaker/switch will NOT blow anymore, because the light bulb
> that you just installed in series between the wire you pulled off, and
> the switch itself, will limit the current to ONE AMP (plus or minus a
> tiny bit). All the wiring and crap in the aircraft can handle one amp
> with ease. If you want to lower the amount of current, just use a
> smaller bulb... For example a 12 watt bulb would give you a maximum
> current draw of about 1/2 amp. Current in this case will be equal to
> the wattage of the bulb divided by the voltage.
>
> You can now start trying to find the problem by tracing and removing
> other wires, as you were doing before, or simply by jiggling things
> around.
>
> Some might recommend that instead of doing it this way, you simply use
> an OHM METER connected to your wire that you pulled OFF the switch.
> This will also work if you know exactly what you are doing, but the
> light bulb trick makes finding a problem like this easier and it is an
> ACTIVE versus a PASSIVE check. If the bulb is brightly lit, you have a
> short circuit involved. Which is of course what you DO have. When the
> bulb goes out, or gets very dim... You just located the problem.
>
> You need to be more detailed with your explanation if you could please.
>
>
> There are NO SQUAT switches in the YAK-50. A SQUAT switch is one that
> closes when you LAND THE AIRPLANE and put weight on the landing gear.
> The YAK-50 does not have anything like that.
>
> Instead there are FOUR switches that control the landing gear lights on
> the 50. One switch for each light on the dash. There are two switches
> on the left side, and two switches on the RIGHT side. ONE SWITCH FOR
> EACH LIGHT! You are only seeing the switch back behind the gear
> actuator where the wheels go into the hole. There is ANOTHER switch
> that is located underneath a panel right behind the gear leg itself.
> The panel right behind that landing gear fiberglass shroud.
>
> I do not know of any electrical motors behind the instrument panel.
> There is of course the electrical inverter for the attitude indicator
> (if you still have it installed) behind the seat. At this point, I
> would not waste a lot of time looking for the weird noise... Since you
> already have enough other weird crap already happening.
>
> You took the fairings off the wing root(s) and have access to the wiring
> connections going out to the pitot probe and the switches. REMEMBER
> AGAIN... Two switches on each landing gear! Anyway, that is a good
> thing. You might want to do the same for the other side too, so that
> you can access that wiring, but I suspect the wiring short circuit is
> not out there.
>
> QUESTIONS:
>
> What happens in the cockpit when you leave the instrument breaker OFF
> and just turn on the landing gear breaker?
> What happens when you turn on the instrument breaker and leave the
> landing gear breaker off?
>
> REALLY NEED TO KNOW THE ABOVE ANSWERS.
>
> What is obvious here is that when you apply voltage to wire 05-cw2-01 by
> connecting it to the switch and turning it on, the voltage through this
> wire is shorting to some other WIRE that it should not be doing. The
> problem is that this wire is also obviously the main voltage feed for
> the landing gear circuits. The voltage on this wire feeds to all four
> of the landing gear switches... The two UP switches and the two DOWN
> switches. Wires coming back from these switches then go to the light
> bulbs in the cockpit themselves and make them come on. So picture that
> in your mind.... Voltage comes out this wire (the one hooked to the
> switch), and someplace goes to a terminal board and splits to go out to
> all four switches. It then comes BACK from those switches and goes BACK
> into the instrument panel and to the lights themselves.
>
> Next, consider that you have had a problem on the LEFT side of the
> aircraft for quite some time. This has been a case where the landing
> gear DOWN switch has probably gone bad or is out of adjustment. Again,
> you need to locate that switch, because that is yet another problem,
> probably not related to this current mess.
>
> The short circuit you are dealing with is probably NOT in the wings.
> When you pressed the switch on the right landing gear, and then the
> light for the left gear lit up, this is not a case of a wire switched
> around, this is a case of some wires that are SHORTED TOGETHER.
>
> So some advice.
>
> When describing what switches you are pushing in the future, make sure
> you name them correctly. One is for right gear down and locked. One is
> for right gear UP and locked. Same thing for the left side. No squat
> switches ok?
>
> It appears that the wire that is shorted is one of the wires coming BACK
> from one of the switches TO the lights on the instrument panel. One of
> THOSE wires has shorted to another wire or wires causing all the other
> lights to come on. Most likely it is a short to the TEST SWITCH that
> causes all those other lights to come on. So to repeat, this is
> probably a dead short between one of the wires coming back from the
> landing gear position switches, that is shorted to the TEST switch
> WIRING.
>
> To repeat again, the way I would try to find this would be to pull the
> 05-CW2-01 wire off the switch as you already had done. The install the
> 28 volt light bulb with the wires connected to it in series. It will
> go: switch, wire, bulb, wire, then hooked to the 05-CW2-01 wire itself.
> In SERIES. You will then limit the current draw and will pose little
> to zero risk of blowing anything up any further. When you turn on the
> switch, this light will come on brightly. If you want, you can put
> plenty of wire on the bulb and remote it out of the cockpit so it does
> not get in the way. Have someone watch this bulb like a hawk. Now get
> your hands back in the wiring and start moving wires and wire bundles
> around... All over the place. When you see that light bulb start
> flickering wildly, you are on top of the problem.
>
> A complete wiring diagram will be really handy. I do not have one.
> HOWEVER... This is not a case of a failed component. This is a case of
> some wires shorting together that were never meant to be. Wire
> CHAFFING, or rubbing under a clamp, etc.
>
> There is a very VERY small chance of a relay failing internally ...
> Literally falling apart inside, and shorting everything out that could
> cause this. This would be the light bulb TEST RELAY that is turned on
> with the light test push button, and we would definitely need the
> schematics to identify which relay this is. It is also possible that
> this relay got fried during this failure. So other than wiring, this
> would be the first component I would spot light for sure.
>
> Harry.. You're out on the west coast aren't you?
>
> Mark Bitterlich
> N50YK
>
> P.s. Rewiring the aircraft is a do-able thing, but man oh man, it would
> cost a small fortune.
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Harry
> Hirschman
> Sent: Monday, September 11, 2006 14:38
> To: Yaklist Yaklist
> Subject: Yak-List: Yak-50 Electrical System Troubleshooting
>
> --> Yak-List message posted by: Harry Hirschman <hairball192@yahoo.com>
>
> All:
>
> I'd appreciate any assistance people are willing to provide to assist me
> in troubleshooting my Yak-50's electrical system.
>
> Symptoms:
> 1. Chronic problem of the left gear down indicator light on or off-on
> when landing gear is up (with two red up-and-locked lights also on)
>
> 2. Recently all annunciator lights (all four gear indicators,
> generator, Over-G, chip, all cells on fuel
> ladder) flashing on-off; Last flight all annunciator lights were on and
> steady (same look as pushing the press-to-test by the gear handle)
>
> 3. My electrical switches are labeled "Gear" and "Inst"; The "Inst"
> switch controls the proper reading of the fuel ladder (ie: it reads the
> correct amount of fuel with this switch on), generator annunciator light
> and engine instruments; The "gear" switch controls the landing gear
> position indicator lights, all the light cells on the fuel ladder (same
> as pushing the "k"
> button to test the fuel indicator), the chip light and the over-G light
>
> In troubleshooting over the weekend, I performed the following steps and
> got the following results:
>
> 1. Turned on the following switches: Battery, inst, and gear; All
> annunciator lights came on, I heard what I think is some kind of
> electrical motor wind up for a few seconds, then the "Gear"
> switch-breaker flipped itself off and the associated annunciator lights
> went off and the sound ceased
>
> 2. After cycling the switch a half dozen times with my head under the
> panel to try to locate the noise, the motor stopped coming on with the
> gear switch, but it continues to break to the off position after several
> seconds in the on position; There is about a 2 amp draw with the "gear"
> switch on as indicated by the aircraft guage; The noise was coming from
> behind the instrument panel, but I couldn't locate the component
>
> 3. There are two wires attached to the "gear" switch; Removed the wire
> labeled 05-CW1 and turned on the batt, inst and gear switches with the
> same result -- 2 amp draw and gear switch breaks to off after several
> seconds
>
> 4. Removed the wire labeled 05-CW2-01 and turned on the batt, inst and
> gear switches and now the gear switch does not break, the elec system
> remains on; The landing gear indicator lights, fuel ladder lights, chip
> light, and over-G light do not illuminate (proper fuel indication,
> generator light on, and engine instruments are powered) -- so the bad
> wire is this one, I think
>
> 5. Re-installed both wires and verified that the system fails in the
> same way as before
>
> 6. Friends manually held both landing gear position squat switches in
> the "gear-up" position and turned the electrical switches off with the
> same result -- Gear switch breaks to off after several seconds
>
> 7. Disconnected the left gear position squat switch at the bus bar in
> the wing root by removing the lower three of the four wires (I believe
> the top wire is for pitot heat) and turned on the batt, inst and gear
> switches -- GOT IT -- Same result as step 4 above -- Gear switch does
> not break, the elec system remains on with a right gear down green
> light; I'm fuzzy on this part, but I believe I did the push-to-test for
> the annunciator lights and all worked EXCEPT the chip light and over-G
> light
>
> 8. And then the plot thickens -- With the electrical system on,
> manually depressed the RIGHT landing gear squat switch -- The RIGHT gear
> down light went out and the LEFT gear up light went on (hopefully a
> simple crossed wire) AND got a 2.5 amp draw and the gear switch broke to
> the off position after several seconds
>
> Only two things scare me and both of them are electricity, so I wouldn't
> have been able to do any of this without the able help of some airport
> buds (Ken and John). I hope I've given those who know something about
> this enough information to narrow things down for me.
>
> I've got a couple of specific questions in addition to the overall
> recommendations I hope will be
> forthcoming:
>
> - What electrical component do you think was making the noise described
> in troubleshooting steps 1 and 2?
>
> - It looks like there are separate parts for the left and right landing
> gear squat switches; Is that true?
>
> - From anyone out there has removed the entire Russian electrical system
> and rewired new, how much time and money did that take? Do you have a
> parts list for the new system?
>
> - Does anyone out there have an electrical diagram for the Yak-50?
>
> Many thanks in advance to everyone who's read this far and to those who
> take the time to respond.
>
> Regards,
> Harry
>
> __________________________________________________
>
>
Message 12
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| Subject: | Re: Yak-50 Electrical System Troubleshooting |
--> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
Damn, I'm glad Bitterlich works for OUR navy.
--------
Mike Bell
Yak 52
Elk Grove, CA
yakflyr@comcastdotnet
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=61600#61600
Message 13
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| Subject: | Re: Yak-50 Electrical System Troubleshooting |
--> Yak-List message posted by: "Roger Kemp" <viperdoc@mindspring.com>
Amen brother...glad he has such a grasp on the electrical systems of YAK's
also!
Doc
> [Original Message]
> From: Mike Bell <yakflyr@comcast.net>
> To: <yak-list@matronics.com>
> Date: 9/14/2006 11:50:11 AM
> Subject: Yak-List: Re: Yak-50 Electrical System Troubleshooting
>
> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>
> Damn, I'm glad Bitterlich works for OUR navy.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=61600#61600
>
>
Message 14
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| Subject: | No Guts, No Glory is now available as a download.....Enjoy. |
--> Yak-List message posted by: "Tim Gagnon" <NiftyYak50@msn.com>
David McGirt was kind enough to put this up.
http://www.mcgirt.net/yak/dmcgirt/NGNG.pdf
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=61639#61639
Message 15
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| Subject: | Houston Area Yak owners... |
--> Yak-List message posted by: "Tim Gagnon" <NiftyYak50@msn.com>
I know about the large contingent at Pearland (I will be in touch with you guys
soon) but I was looking for anyone else in the area....
Drop me a note.
NiftyYak50(at)msn.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=61672#61672
Message 16
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| Subject: | Re: Yak-50 Electrical System Troubleshooting |
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E" <mark.bitterlich@navy.mil>
Nice thing to say Mike, thanks. (!!!)
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mike Bell
Sent: Thursday, September 14, 2006 12:34
Subject: Yak-List: Re: Yak-50 Electrical System Troubleshooting
--> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
Damn, I'm glad Bitterlich works for OUR navy.
--------
Mike Bell
Yak 52
Elk Grove, CA
yakflyr@comcastdotnet
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