Category Archives: Avionics

How to I troubleshoot a Honeywell 880 radar

Here are some example faults


880 has RS 232 troubleshooting port out of the RT base.

Roll Cal proceedure

To exit force standby , STAB button 4 times in 3 seconds




Pilot Event Marker

(1) A pilot event marker is created by operating the switch on the GAIN control for two

cycles (pull out, push in, pull out, push in). A full set of parameters at that instant is

stored in the fault log. This can be useful if the pilot senses that there may be

something abnormal with the radar operation, but no fault code is being shown. This

data must be read using the RS–232 port.


Altitude rings

How do I make peace with Baker Audio switching….MHE

The software is called MHcom


In BMB the 9 pin test port is in the right mid-cabin cabinet.


Buss terminators are there also on the Tstrip.



The buss at any/every pin 3 to 4 must read 60 ohms, that is 1 120 OHM resistor on each end of the buss.


THEN go to MH com


here is the initial hookup


for BMB the direct ping is 4.27.0.XX where XX is the id of the unit you are trying to hit


here are the print for BZZ


59454300 Baker MH Entertainment Sys


Switch Panel Options



Notes from a previous mechanic lost in the mist of time



P p



How do I come to terms with a Honeywell MK V EGPWS?

How Often should I install a EGPWS database?

Our ICA’s for the installatins on BMB and BZZ do not require ANY update, EVER.

Many N registered aircraft are never updated, until upgrade time.

That seems a little slack.

The Honeywell website informally recommends this:

EGPWS Recommendations
Update to the latest Terrain Database at least twice a year. Updates can be downloaded from the Database Page of the EGPWS web site.


So, how about twice a year?

here is the schedule of database release dates.

here are the kown issues;

bottom of the page “RAAS Known Issues”


Click Here to download database:



same password as NZ2000 data base. call 800-247-0230 to get to account access

Must be OMNI Drive LF for linear format.

Only good for MK5 and MK7

If you have a 6 or 8or 22, you must also have smart cable.


AES website


For realtime troubleshooting, Here is the Winviews text:


WinVIEWS (Windows Virtual Interface to the Enhanced Warning System) is a software tool developed by Honeywell
to monitor or view values within the EGPWC, and perform certain test interface functions.
Overview: The WinVIEWS software provides a monitor function that does not alter the operation of the EGPWS.
The monitoring of the values assists in the testing of the EGPWS by allowing the operator to quickly determine if the
correct signal and scaling is being used by the EGPWS. Additionally, WinVIEWS provides a detailed status of the
software configuration and input signals, which enables quick identification of system anomalies. WinVIEWS is also
utilized for programming the Configuration Module in MK VI, MK VIII, and MKXXII applications.
To obtain a copy of the WinVIEWS software, please visit, select the Installation Information page,
then select the Diagrams, Drawings & Software sub-page. WinVIEWS is available as a self extracting .zip file. A
User’s Guide is available there as well.
In addition to the WinVIEWS software, a command file may be utilized. The command file is a simple text file that
includes each Current Value Table (CVT) Item used in a test procedure. The file must be ‘text only’ such as those
created in the Microsoft Windows NotePad program. It should have a filename extension of .wvc or .cmd. The
webpage mentioned above also contains generic command files for use in ground and flight testing the various
EGPWS models.
To use WinVIEWS a RS-232 cable (PN 704-2670-001 is required) to connect the PC 9-pin comm port to the
EGPWC 15-pin test port.
Typical WinVIEWS operation with the EGPWC:
1. Connect the PC to the EGPWC via the RS-232 cable defined above.
2. On the PC, start the WinVIEWS program (requires Windows 95 or later).
3. WinVIEWS opens in the Terminal Mode. Various commands are available in this mode. Type “HELP” or “?” for
command help. In particular, CVT Items may be added or deleted to/from the display to assist with system
4. Under the File Menu select the “Load Command File” option and load the appropriate Command File.
5. Use F6 to select the Display Mode: each CVT item listed in the Command File will be continuously updated at a
rate of at least once per second. The value shown for each CVT Item listed is the current value used by the
EGPWS. F6 toggles between the Display and Terminal Modes.



here is a typical interface

275-087-M1134 Ground Promity Warning System

How do I make peace with the internet service in F900EX s/n 028, VQ-BYT

switch off the laptop wireless connection.. switch near handle.
If the Satcom is turned off, there is no DHCP server,,,, so:
set the troubleshooting computer to:  Static IP to
Hard-wire Ethernet connection to the RJ45 in the Pedestal.

WRT54GL Log In

User: Admin
Password: *aircell1*
And yes those are asterisks or stars included in the password
Tread Carefully.
The Satcom is a Thrane&Thrane SwiftBroadband
Aircell Aviator 300 , tt5040A SBU
Aircell CTR

How do you retrieve the BIT Fault codes from a LaserRef1?

How do you retrieve the BIT Fault codes from a LaserRef1?

“BIT” button leads to 3 pages :
Bit 2- Current Status
Bit 3 – Last Flight
Bit 4 – All History

Now: lets look at the 270 word

One example is 0082 2800

Note the first two digits are 00 and the last two are 00.  they are unused digits in this scheme.

This Work sheet might help with the decode.

And the 270 Word definition, or the 350 word definition might help.

My notes from N850BA EGPWS squawk.

What are the EASA requirements for DFDR and CVR installations?

Here is my analysis of the specific requirements for DFDR Channel count requirements for

F900B S/N 051, Type certA46EU, originally issued March 7, 1979:

ICAO Annex 5 Part I, chapter 6

After reviewing every exciting paragraph carefully, we are NOT required to have a Type I, Type IA, Type II, OR a TYPE IIA recorder. These types of recorders have concisely defined lists of required parameters.

The paragraph that we are forced to comply is, and, including a), and b).

These requirements are VERY VAGUE and obviously meant to be looser requirements than the Type 1and type 2 recorder installations.



How do we comply?


DFDR P/N 980-4700-25 in BMB and BZZ:


We can now use the HHDLU owned by Duncan BTL.  Contact Scott Davis at FTW to rent it.


Send the results of the download to


Also send this list:


FalconAMM_Ch31_Appendix A


then fight through the results to see if anything is REALLY missing?  File the results.



some old notes


OTAR 91.140 (a) (1) (ii) 




Now then…. here is the history that was set in motion by the insistence of Dan Staina.

The items that we have been complying with up to this point are:
ICAO Annex 6 , Appendix 8, Section 7.
7.1 is complied by the Pilot’s Taxi Checklist.
         we got that sorted out 2 years ago with a Notice To Staff.
7.2 a), and b)  is complied by pulling the DFDR and sending it to Honeywell…..GIGANTIC pain in the behind.  Honeywell provides a letter that states the DFDR is correctly recording the parameters that the Falcon work card calls for. (32 parameter list)
c) is complied by having the pilots pull the C/B on the Taxi In prior to the removal.. That way we capture a full flight for Honeywell Analysis.
d) Honeywell.
e) The Falcon work cards fully test the CVR operation in the airplane.
f) “where practical” The CVR’s are removed  and read out every year. The CVR from BZZ goes to Duncan for readout. Honeywell for the other CVR’s.  We retain a voice CD of the recordings.  I was been verifying the “Intelligibility” myself by listening to the .WAV file.
I say that is SUPREMELY  UNPRACTICAL. I would like to suggest that you quit doing this and change the CAMP code to AS REQUIRED
g) N/A , none of the aircraft are fit with AIR (Video Recording)
7.4 we comply with this by filing the Honeywell and Duncan results right in the work order binder.
7.5 a) this is due on BMB.  It is not due on BZZ because it has been installed less than 5 years.  Best I can tell, this is ONLY the calibration of the 3 resistors that report the control column position.
This is the best summary of where we stood 6 months or so ago.
Portion of the ICAO ANNEX attached.









What are the Standard Data Interfaces for a DFDR?

ARINC Report 657 Airborne Recorder File Format

This document defines the characteristics necessary to standardize the airborne recorder download file format in order to facilitate data import, transcription, and exchange. A standardized data format will reduce the variety of readout equipment required for airborne recorder data transcription. This document defines the detailed architecture of the Recorder Standard Output (RSO) file. The architecture is a tagged file structure within which many different files and their formats can be supported. The structure is necessary to support newer recording requirements for flight data, data link, audio, and image recording. This structure is intended for use with all civil recorders and should support use with military recorders.

Last Print: 02/2009
Price (PAPER): $196.00
Price (PDF): $98.00

Godd reegulatory discussion


This AIRINC overview includes a detail of Airinc 573, for flight data recorders