Category Archives: Uncategorized

How Does Aviation Mic Circuit Work?

Short story:

Buy one of these elements and some clip leads and try it.

Long story:

Seems like the basic problem is to get wide voltage swings like a old carbon mike would produce from a electret element as per this explanation

This Mic schematic gives a clue.


This list
seems to be the long way around the horn.

Earnest is a real thinker, and here is what he thinks about building a cheap headset


here

DIY on a couple of lists

here

here

here

here

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good deal.

Now

these guys

http://art.simon.tripod.com/stealth.html

are talking about drilling out an airbud and mounting a mic elemnt within.

This allows recording of stereo phonic sound, just the way you ear would hear it.

Sneaking recording devises into concerts and such.

What if you took your idea of a In-The-Ear speaker in one ear, and put a MIC element in the other ear. You should be able to record the human voice, through the ear canal, and do away with ambient wind noise?

Open cockpit application

todd

How do I build up pitot/static hoses?

Freon service hosekit to scavenge the nice end fittings.  Each kit offers 6 fittings, so order 2 kits and you will have plenty.   They have a nice soft flare seal that is replaceable.  Destroy the end crimp.  Purchase 3/16 soft rubber service line. Cut to length and have a hose shop crimp new brass sleeves.

You need to end up with at least:

1 Static Hose, 30 Ft with a T, two 10 foot hoses. Long enough to wrap around the fuselage to reach the static ports.

1 pitot hose, 30 Ft with a T,  at least a 6 foot on the end. Long enough to reach to each pitot tube.

This does not speak to the airplanes that will need to have the Pilot, AND copilot AND Standby Pitot/Static to be run simultaneously  Two more t’s and 4 short hoses required for that.

img_0501

Freon hoses from :

http://www.r22.org/prod_list.php?sci=30

“CoolGas on the invoice
3/16ths hose and crimp service from:

Kims Hose & Fittings Inc
maps.google.com
2605 White Settlement Road
Fort Worth, TX 76107-1329
(817) 332-8953

++

Here is the the Pitot adapter turned down from a brass fitting. Use normal Vinyl tubing with Worm clamps to slip onto the Pitot tube.

Here is a angled end fitting with dust cap and lanyard made from a Shark Leader

img_0494PitotFittingsLathe

Shark leader and crimper:
img_0502

Dust caps are just plugs

img_0504

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Here is the NavAids Canada Adapters:

http://www.navaidsltd.net/Brochure-2006-1.html

Aircraft Ground Support Equipment

Aircraft: Falcon 900
Category: Commuter & Corporate

___________________________________________________________________________________________

Pitot Test Adaptor : P55517M1-3

Pitot Probe Part No. : 50520

Static Test Adaptor : SS44111P-60 – 4

Blanking Adaptor : SS44111PB-60*

Misc Adaptors : 21298L-225-4 / 21298LB-225* Standby Static

Pitot Pre-Test Probe : PT15551

Air Data Accessories Kit : ADAF592-723

Air Data Accessories Kit RVSM : ADAF592-945

Pitot Cover : PC555-17SB

Seal Kit : SK517

Seal and Spacer Kit : SSK517

Lubricating Fluid : LF5050

 

 

 

 

 

 

 

 

 

Pump outer square  seal id 1.372 od 1.61 thick 1.31

Pump lip seal od 1.282.  Id .25 shaft.

 

 

 

 

 

 

 

 

 

 

Why does the Numner 1 Gen Switch trip on a 900

When 6PA cover is off, USE PLASTIC TOOLS. Lots of exposed high power 28VDC.

1.How sure are we that we did not put the bad APU GCU in the number 1 position this spring(During APU Uncommanded Shutdown troubleshooting)? How sure are we that we did not put a bad EXCHANGE GCU in the #1 position.

2.Has 8P1 Been swapped? Tap on 8P1 while Generator is running.

3. Backpin GCU pin P. Watch this voltage while the generator is running. Should be ~27 VDC. fluctuating voltage would be a symptom of the failure.

4. A poor connection at Pin F of the GCU could cause the internal voltage regulation to fail. Check Pin Tension. Ring all the way out to Generator B lead

5.Visually inspect CR17, CR23 4.Remove CI1, Remove 6PA panel plug A and megger the leads on CR17, CR23

6.Remove 6PA panel plug A, and megger the Plug a Pin U to ground. Check the harness side going forward to the red switch.

Previous action:

Late June 2010: Happens on climb out prior to 10,000 feet.

Late June 2010: Performed A Lead megger check again. (New York)

Early June: CI1 and CI3(?) swapped (Switzerland)
HES 1 replaced with new. (Switzerland)
Another Circuit card swapped (Switzerland)

Late may 2010: replaced switch 2PA1 with new. (Bermuda) Mid spring 2010

How do I trouble shoot an XM weather

The Honeywell XM Install Manual A15-7126-001 had instructions that differed.

Gerry Latour

Avionics Repair Manager

glatour@prostaraviation.com

From: Gerald Latour
Sent: Wednesday, January 13, 2010 10:28 AM
To: ‘blowe@longtailaviation.bm’
Subject:

Good Morning Butch,

I received an email from Andy Brown that the XM is still inoperative on VP-BMB. I called XM toady and asked if the account is active yet. They informed me the receiver currently installed is still attached to Honeywell’s demo account. The demo account consists of Aviator Pro level service. They could not tell me when this account will become inactive. Longtail should contact XM and set up an account for receiver ID# CE6NK0CA (800-985-9200).

XM said you should still be able to receive all data associated with Aviator Pro on the demo account. I would suggest the following steps for troubleshooting this issue:

1) Activate the account with XM.

2) Do a system refresh using the ID CE6NK0CA at xmradio.com/refresh just prior to the next flight. The refresh should be requested while the aircraft is outside with a clear view of the southern sky and have power available for up to 45 minutes afterward.

3) Inspect the receiver for a red led with power applied.

4) Check for power and ground at the receiver. (28VDC at pins 18 and 19; GND at pin 37)

5) Check center/shield resistance of the XM coax at the receiver with the antenna connected with a digital meter. It should be around 30 ohms.

If these steps do not yield positive results I would like to connect an EFB to the receiver data connections that the File Servers are currently using to see if we have a File Server issue. Can you provide the Part Numbers of the File Servers?

Thanks,

Gerry Latour

Avionics Repair Manager

glatour@prostaraviation.com

Ph: 603-627-7827 (Ext. 118)

Cell: 603-566-2767

Pro_Star_logo_1035x800

 

Service Bulletin to cycle the power when you coast-in to the US

XM_Cycle_thePower_D201008000063

Phone Number

This activation will terminate automatically without prior
notice. To avoid unexpected deactivation, customers should contact XM Satellite
Radio Inc. at 1-800-985-9200 to transfer the subscription immediately after
installation.
Please contact

 

Installation Manual Notes

WX Interface 115.2Kbaud, No parity, 8-bit, 1 stop bit, RS 422

 

Craig’s troubleshooting in San Antonio on BZZ, June 6 2014:

Installed XM receiver now is D is DB3QX00B. contact with Ana was 1-800-985-9200.

The account number for Longtail  1-4982589656

HeadsUp technology says this about baud rate settings

XMD Baud Rate Dipswitch Settings

 

The baud rate for the XMD receivers is controlled by dipswitches 7 and 8. These are the switches located adjacent to the bottom connector and are the farthest from the connector. Switch 8 is the outmost.

Both down  125K

7up  8down 115.2 K

Both Up    57.6 K