Category Archives: AircraftTroubleshooting
What a are few Avionics “System wide” troubleshooting ideas?
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
How do you use a DVM to sample a Thermocouple lead
How do I come to terms with the Primus 2000 “Download and Clear” BrewHaHa
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
What in the world is this?
1 year
Old Notes on VQ-BYT
F900EX Avionics Download 2017-05-15
This is the MAU drawing fir Modified F900SN022
How do I make peace with the Printer on BZZ?
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
How do I come to terms with AVTECH LED Strips
LED strip Flickers:
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:
Connector numbers:
Non Corrosive RTV:


| MSC Part #: | 00232025 |
|---|---|
| Big Book Page #: | 2167 |
| Brand: | Dow Corning |
| Mfr Part #: | 748-2455846 |
does falcon allow you to build breakout boxes?
here is the PDF workcard
StandardPractiseCardTSKFNXFIM10209001910901EA01
BreakOutBoxTSKFNXFIM10209001910901EA01
which Sealant is Which?
How do I come to terms with Fault Codes in a SPZ-8000 for F900?
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.
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 – 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:
how do markings on oxygen bottles work?
o2 bottle
http://www.usamma.amedd.army.mil/assets/docs/oxygen%20cylinder%20markings.pdf




















