Category Archives: AircraftTroubleshooting

AircraftTroubleshooting, Avionics

What a are few Avionics “System wide” troubleshooting ideas?

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DC Electrical troubleshooting handout book

Electrical Troubleshooting Workbook2

Ring lug bad crimp

https://youtube.com/shorts/cXWvA59PAoM?si=dFQqnw2T9P-mWbuK

Autopilot

AP106

In a WestWind, 4 seconds after “ALT”…”CAP” the pitch mode is in CAPTURE mode.  High gain response from the BARO knob to the Control column.

APPS 80

On the ground

APPS 80 “force” indicators actually indicate. Last integrator output before the servo.

Jumper 7 and 10 to look at the APP valids.

does the batt handle snatch and then release

permanent offset may be NAC or LAC

 

Flight Director.

Fly the aircraft on 1 inverter in NORMAL, 1 in ALTERNATE, the see if it is a inverter sync problem.

 

HF Com

HF950 System

in a F900, Transmitter/Receiver and the PA must be MOD LEVEL so and so because of the distance from the tail to the nose.  the squawk is a tuning tone that will not go away.

Receive problems:

Tune 5000, 10,000, 15,000, or 20,000 for WWV audio.

Remove all connectors  to the P.A.  Install a temporary antenna to the REC/EXT.  try WWV again.

Transmit problems:

AM radio will demodulate the transmitter if it is placed on top of the fuselage.

Watch for 10 to 40 amps on the aircraft load meter while transmitting.

Pin Diode and Headphone works good also.

load resistor

 

VHF com

Whaite Noise? Temporary antenna

ELT reradiate

 

Collins 3 digit boxes – 3 429 in, 2 429 out.

422, 422 strap

 

Audio Integration

 

 

VHF Nav

antenna quality/ Audio Quality

 

 

ADF

MoneyMaker:  ANT(enna) mode rather than ADF mode?

White Noise?  If there is no White Noise, temporary sense antenna.

Audio?

Needles stow at 90/270?  Needled Hunt? Indicator installed upright?

Loop Modulation stronger when TEST needles are swung away from null

Ground power unit affects needles.

Tends to oppoint correctly ForAft? one bad coil

 

Needle points OK erratically. H-C excitation on the needle circuit.

 

 

DME 

Neon lamp at antenna.

GPS

Remove the GPS antenna.  Looking down the coax to the receiver, there should be 5VDC on the center pin.  That proves the GPS is plugged in and powered.

Radar

FSTBY escape for a 880 stsem is “STBY” button 4 times in 3 seconds

Paint ground targets

 TXP:

The cheaper the transponder the more critical the antenna.

Mode C Gillam errors

reply light on all the time

 

Radio Altimeter:

sloped sheet metal

 

F900 Troubleshooting

How do I come to terms with the Primus 2000 “Download and Clear” BrewHaHa

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If you get a “Avionics Maint” white message:

 

You can ignore it.  Or you can go through a 1 YEAR hassle trying to get all of this stuff figured out..

 

Hart Aviation:

We build a Primus Data Loader, P-2000 Maintenance Access Unit, (Built to Honeywell Drawings). This unit was built for the roughly 19 Falcon 900’s that did not have built in data access ports. (See our web site under the Falcon 900 section near the end of the page) We have one on hand which sells for $4250.00.

F900ex S/N 028 the l42FV and R42FV are under the blank covers in the side consoles.

 

here is the written instructions:

F900EX Primus 2000 Download & Clear Procedures

 

MAU Drawing

MAU Drawing

 

What in the world is this?

com.merx.npoint.servlets-1

 

1 year

DLC

 

Old Notes on VQ-BYT

F900EX Avionics Download 2017-05-15

 

This is the MAU drawing fir Modified F900SN022

 

 

 

F900 Troubleshooting

How do I make peace with the Printer on BZZ?

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Here is the last action when Hugo worked on it:

 

Hi Todd, below are the steps we took to fix the printer issue.

 

1.       Wireless printer was configured to connect to some unknown wireless network. So we had to reset the printer when we took it back to the office.

2.       We upgraded the firmware on the printer so that it could support air print. We enabled Bonjour on the printer.

3.       Configured printer with IP address 192.168.1.173 and successfully connected it to the plane’s “VQBZZ Wireless Access” network

4.       Tested printer successfully from windows laptop via wireless and iPad via air print.

Hugo E. Sanchez 

P 210 321 8572
C 210 663 3163
E hsanchez@argogroupus.com

AircraftTroubleshooting

How do I come to terms with AVTECH LED Strips

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LED strip Flickers:

http://youtu.be/yQ0nQLlYae8

Intermittent solder connection from LED POwersupply Board to LED strip.:

 

And the cold solder joint that caused it:

 

The installation notes:

AvTECH_Flood LED installationP25D001C[1]

 

Crimpers:

 

CrimpersForAVTECH lighting63811-2800%20Spec[1]

 

Dies for crimpers:

 

The 63811-2800 number is a good number for the crimp tool handle (the Frame).
The die part numbers vary the part number of the pins being crimped.

 

 

 

Connector numbers:

 

Non Corrosive RTV:

MSC Part #: 00232025
Big Book Page #: 2167
Brand: Dow Corning
Mfr Part #: 748-2455846

 

 

F900 Troubleshooting

How do I come to terms with Fault Codes in a SPZ-8000 for F900?

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Here is the simple break-in to get the codes:


REMEMBER::::::

If you pull the breakers in the air as a matter of troubleshooting, the codes are lost!

If you land and power down airplane, the codes are lost!

 

If you are using this diagnostic on the ground after powerdown,  YOU ARE WASTING YOUR TIME!  It’s like giving a dog investment advise.  It’s not helpful, and it anoys the dog.

 

 

Flight Fault summary must be performed after aircraft lands, before power is turned off.
YD and MTRIM must be dark.
At the copilots left elbow in the engineers Panel.
There is a Bat Handle switch labeled “AFCS TEST” or some such.
Select it up.
The ID802 panels will self test.
Then , When they are finished you should see “01 – FGC TEST?” Do NOT perform the test now.
Instead, push the LAFCS button which in this case acts as a “Previous Screen” button.
A few screens back, you will get to “98 – FLGHT FAULT SUMMARY”
Push “RESET” to get to the flight fault screen.
That should show the codes for the LEFT computer.
Take a picture of that screen.
Now press reset again.
That should show the RAFCS faults.
Take a picture of that screen
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Here is the Spreadsheet that unwraps the Hex code to plain english…. or as plain english as a Honeywell engineer can make it.

 

This one runs under Libre Office:

SPZ-8000-Flight-Fault-Summary   .ods

 

 

This one runs under excel:

SPZ-8000 Flight Fault Summary

 

SPZ-8000-Flight-Fault-Summary – this one is from Augusta

I think these spreadsheets were written by Terry Markovich.  Genius that ran Duncan TEB back in the day. Super clever.

here is an example fault code

 

 

Plain Text trouble shooting book:

 

Falcon 900 DFZ TS Guide

F900 Troubleshooting

How do I come to terms with Arduino-429 interface?

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Here is a wonderfull 429 overview

429commentary

airinc_429TheAvionicsHandbook_Cap_2

 

https://batchpcb.com/pcbs/73951 ia a universal converter project.

 

The fellows name is AllThumbs on VAF http://www.vansairforce.com/community/showthread.php?t=95229

 

http://www.vansairforce.com/community/archive/index.php?t-82604.html thread about the SL30 to Dynon HSI

 

 

http://www.instructables.com/id/Interfacing-Electronic-Circuits-to-Arduinos/ is a very nice explanation of a 429 to 232 converter

Here is the data from Niel on the frankenverter

FrankenVerterInitialFiles.tar

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

here is a nice blurb on using a parallel port to test AIRINC 429 equipment

testing429WithPC

 

here is some detail abouthe labels

Arinc429WordList (copy)

Here is the first Distillation of equipment labels

Labels

 

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2024 revival project

https://github.com/ncormia/FrankenVerter

https://github.com/ncormia/FrankenVerter/blob/master/a429.h

https://github.com/ncormia/FrankenVerter/blob/master/FrankenVerter.ino

 

Explanation with scope