AV-20-E Display TailBeaconX Interface

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Product Information

Specifications

• Product Name: AV-20-E
• Software Version: 1.7.1
• Manufacturer: uAvionix Corporation
• Weight: Not specified
• Operating System Compatibility: Windows 7 or later

Product Usage Instructions

1. Applicability

This Service Bulletin applies to the uAvionix AV-20-E
UAV-1003626-001, with operating software releases 1.6.5 or
earlier.

Verification Process:

1. Navigate to the SETUP page.

2. Press both left and right buttons simultaneously.

3. Highlight SYSTEM INFO with the up or down buttons on the
   left.

4. Enter the SYSTEM INFO screen by pressing the ‘SEL’ button on
   the right.

5. If the SW VERSION displayed is 1.6.5 or earlier, proceed with
   this Service Bulletin.

2. Description

This Service Bulletin provides instructions for loading uAvionix
AV-20-E UAV-1003626-001 with updated software release 1.7.1.

3. Time Required

For field software update, up to 90 minutes is required to
perform this update procedure.

4. Required Items

• Windows PC running Windows 7 or later

• Available serial port or appropriate USB to RS-232
  converter

• Female DB-9 with solder or crimp terminals + 7 female pins

• Male DB-9 with solder or crimp terminals + 2 male pins

• 22-24 AWG wire

• uAvionix AV Update Tool for Windows (UAV-1005199-001)

• AV-20-E Software as shown in Table 4 Software Update Files

5. Software Update Files

Download the software update file below:

• Filename: UAV-1004134-002-av20e-1_7_155c62c2.bin
• Version: 1.7.1
• SW Part Number: UAV-1004134-003
• SHA1 Hash: 72c4bc083482008dd67617884a9a1955ca146d9d

Frequently Asked Questions (FAQ)

Q: Is the software update compatible with all operating

systems?

A: The software update is compatible with Windows 7 or later
operating systems.

Q: How long does it take to perform the software update?

A: Up to 90 minutes are required for the field software update
procedure.

Q: What items are required for the AV-20-E software

update?

A: The required items include a Windows PC, serial port or USB
to RS-232 converter, DB-9 connectors, wire, AV Update Tool, and the
software update file.

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AV-20-E Service Bulletin
Software Upgrade to 1.7.1
AV-20-E Service Bulletin UAV-1007941-001 Rev A

© 2021-2024 uAvionix Corporation. All rights reserved. uAvionix Corporation Bigfork, MT www.uavionix.com support@uavionix.com
Except as expressly provided herein, no part of this guide may be reproduced, transmitted, disseminated, downloaded, or stored in any storage medium, for any purpose without the express written permission of uAvionix. uAvionix grants permissions to download a single copy of this guide onto an electronic storage medium to be viewed for personal use, provided that the complete text of this copyright notice is retained. Unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
uAvionix® and Ping® are registered trademarks of uAvionix Corporation and may not be used without express permission of uAvionix.
AV-20, AV-20-E, AV-20-S BeaconX, tailBeaconX, and skyBeaconX are trademarks of uAvionix Corporation and may not be used without express permission of uAvionix.
Patent uavionix.com/patents

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1 Revision History

Revision Date

A

6/28/2024

Comments Initial release

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2 Warnings / Disclaimers
uAvionix is not liable for damages arising from the use or misuse of this product.
This equipment is classified by the United States Department of Commerce’s Bureau of Industry and Security (BIS) as Export Control Classification Number (ECCN) 7A994.
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

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3 Contents
1 Revision History………………………………………………………………………..3 2 Warnings / Disclaimers ……………………………………………………………… 4 3 Contents …………………………………………………………………………………. 5 4 Tables……………………………………………………………………………………..6 5 Planning Information …………………………………………………………………. 7
5.1 Applicability ……………………………………………………………………….. 7 5.2 Description…………………………………………………………………………7 5.3 Time Required …………………………………………………………………… 7 5.4 Weight and Balance ……………………………………………………………. 7 5.5 Electrical Load Data ……………………………………………………………. 7 5.6 Applicable Publications ……………………………………………………….. 7 6 Required Items ………………………………………………………………………… 9 7 Update Notes………………………………………………………………………….10 8 Update Procedure……………………………………………………………………10 8.1 Serial Update Preparation…………………………………………………..10 8.2 Serial Update Procedure ………………………………………………. 14 9 Troubleshooting ……………………………………………………………………… 20 10 Post-Accomplishment Verification and Actions ……………………………. 21 10.1 Verify Update Versions ……………………………………………………… 21 11 System Checkout…………………………………………………………………….22 12 Support …………………………………………………………………………………. 23 13 Maintenance Record………………………………………………………………..24

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4 Tables
Table 1 Applicability ………………………………………………………………………… 7 Table 2 AV-20-E Applicable Documents …………………………………………….. 8 Table 3 Required Items…………………………………………………………………….9 Table 4 Software Update Files…………………………………………………………..9 Table 5 ­ AV-20-E DB-9 Male Connector Pinout ……………………………….. 13 Table 6 ­ Standard DB-9 Female Pinout for reference ……………………….. 14

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5 Planning Information

5.1 Applicability

This Service Bulletin applies to the uAvionix AV-20-E UAV-1003626-001, with operating software releases 1.6.5 or earlier. Use Table 1 to determine applicability of the software update.

Hardware P/N Marking UAV-1003626-001

Applicability Verify by procedure
Table 1 Applicability

Parts identified above as “Verify by procedure” may have software release 1.6.5 or earlier installed. To determine what version of software is installed:

1. Navigate to the SETUP page. 2. Press both left and right buttons simultaneously. 3. Highlight SYSTEM INFO with the up or down buttons on the left. 4. Enter the SYSTEM INFO screen by pressing the `SEL’ button on the
right. 5. If the SW VERSION displayed is 1.6.5 or earlier proceed with this
Service Bulletin.

5.2 Description

This Service Bulletin provides instructions for loading uAvionix AV-20-E UAV-1003626-001 with updated software release 1.7.1.

5.3 Time Required

For field software update, up to 90 minutes is required to perform this update procedure.

5.4 Weight and Balance

No change.

5.5 Electrical Load Data

No change.

5.6 Applicable Publications

The following documents are applicable to the software release 1.7.1.

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Title

Part Number

AV-20-E Installation Manual

UAV-1004048-001

AV-20-E Pilot’s Guide

UAV-1004049-001

Table 2 AV-20-E Applicable Documents

Revision A A

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6 Required Items

AV-20-E updates are performed using a Windows PC with a serial port and appropriate cable. The following items are required.

Quantity 1 1
2 1 4′ 1 1

Description Windows PC running Windows 7 or later Available serial port or appropriate USB to RS-232 converter Examples: FTDI, Parallax 28030, Sabrent CB-8P6F or similar Female DB-9 with solder or crimp terminals + 7 female pins Male DB-9 with solder or crimp terminals + 2 male pins 22-24 AWG wire uAvionix AV Update Tool for Windows (UAV-1005199-001) AV-20-E Software as shown in Table 4 Software Update Files.
Table 3 Required Items

Download the software update file below.

Filename
UAV-1004134-002-av20e-1_7_155c62c2.bin

Version 1.7.1

SW Part Number UAV-1004134-003

SHA1 Hash
72c4bc083482008dd67 617884a9a1955ca146d 9d

Table 4 Software Update Files
uAvionix software update files are available for download from the uAvionix Support website at no charge, at:
https://uavionix.com/articles/av-20-e-service-bulletin-softwareupgrade-1-7-1/
Click on the link in the section AV-20-E v1.7.1 Firmware and save it to your Windows PC or laptop.
The uAvionix AV Update Tool is available on the website linked above in the section AV Update Tool. Download it to your PC.
Ensure the software and any necessary update tools have been downloaded prior to visiting the aircraft. An internet connection is required to download the software and application. An internet connection is not required to perform the update.

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7 Update Notes

AV-20-E configuration settings will be preserved during the update procedure when possible. However, please take note of all settings before performing the update, and verify settings are correct after the update has been applied. Additional configuration settings have been added. See the installation manual for details for each setting.
If pitot and static lines were not previously connected, ensure appropriate approval and connect the lines now to ensure full
performance and functionality.
Ensure you are running a previous version of AV-20-E software. Specifically, your AV-20-E should currently be running 1.6.5 or earlier.
8 Update Procedure

8.1 Serial Update Preparation
1. If the AV-20-E is connected to a tailBeaconX, it must be disconnected to update software. The update uses the same serial port pins as the tailBeaconX. You must also disable tailBeaconX in software as described in § 8.2.

2. If a tailBeaconX is installed, skip to step 4. If tailBeaconX is not installed, add wires to pins 3 and 4 to the AV-20-E harness. Add an additional ground wire to either the existing ground on the AV-20-E harness (pin 9) or attach the ground wire directly to aircraft ground.

3. Connect the other end of these new wires to a female DB-9 connector. Upon completion of wiring, connect the new assembly to an available serial port or USB serial adapter.

4. If a tailBeaconX is installed, we recommend building a new “Go Between” wiring harness just for updating software rather than modifying the existing harness. An example is shown in Figure 1.
The wiring schematic is shown in Figure 2.

5. Connect the serial+USB cable to your PC and the harness, connect the harness to the AV-20 and apply power.

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Connect to AV-20-E

Connect to existing harness

Figure 1 ­ `Go Between’ Update Harness

Connect to PC
serial+USB cable

PC serial+USB
cable
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Existing AV-20 harness with aircraft power
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Figure 2 `Go Between’ Update Harness Schematic

IMPORTANT! CONNECT PITOT AND STATIC IN AV-20-S MODEL ONLY
AV-20 S

QUICK CONNECT: PUSH RELEASE RING IN TOWARD UNIT TO RELEASE

ROTATING THE PLASTIC TUBE WHILE REMOVING WILL MINIMIZE RISK OF DAMAGING THE QUICK-CONNECT FITTING
AIRCRAFT STATIC SYSTEM

RELEASE

¼ ” OD NYLON / POLYETHYLENE TUBE (OR EQ)

P

AIRCRAFT PITOT SYSTEM

DB9 Female

OAT PWR 1 RESVD 2 SER RX 3 SER TX 4 AC PWR 5 OAT IN 6 AUDIO + 7 AUDIO G 8 GND 9

TYP 22 AWG STRANDED WIRE

Pin 5

DB-9 F

Pin 3

Pin 2

Serial

1-AMP BREAKER

AIRCRAFT POWER

• –
  ANALOG 1uA/K AD590KH (Davtron or EQ)

UNSWITCHED INPUT

USE SHIELDED TWISTED PAIR IF NOISE PRESENT IN AUDIO

OPTIONAL OAT PROBE
OPTIONAL AUDIO PANEL

Figure 3 ­ Wiring Diagram

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PITOT

STATIC

1

5

6

9

Figure 4 ­ Unit Connections ­ DB-9, Male Connector ­ Rear View

All connections are provided on the single 9-Pin D-sub connector and the two pneumatic fittings.

Pin Function

Type

Comment

1

OAT Supply

Output

OAT Sensor Supply

Line

2

Serial Input

Input

Reserved

3

AV-XPORT Input

Input

RS-232 Software

Update

4

AV-XPORT Output Output

RS-232 Software

Update

5

Power

Power

+12 to +28 VDC

6

OAT Sensor

Input

OAT Sensor Input

7

Audio H

Output

Altitude Alerts / Other

8

Audio L

Output

To Audio Panel

Ground

9

Ground

Power

To Aircraft Ground

Table 5 ­ AV-20-E DB-9 Male Connector Pinout

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Pin Function

1

2

Serial Output

3

Serial Input

4

5

Ground

6

7

8

9
Table 6 ­ Standard DB-9 Female Pinout for reference

8.2 Serial Update Procedure
1. Connect the AV-20-E to the Windows PC through the DB-9 connection previously installed in Section 8.1.
2. Apply power to the AV-20-E.
3. Go to the SETUP page and scroll down to PAGE ENABLE.
4. If the XPDR CTRL page is enabled, disable it and power cycle the AV20-E. This step is required for the AV Updater application to detect the AV-20-E.
5. Launch the previously downloaded AV Updater application.
6. On the AV Updater tool, select the appropriate COM Port from the dropdown menu and click “Connect”.

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Select COM#

Click Connect Verify Connection

5. Proper connection has been made when the message “Unit Detected” has appeared on the bottom left corner of the AV Updater Tool. The screen on the AV-20-E will go black for the remainder of this procedure. If “Unit Detected” does not appear, re-check your wired connections or contact uAvionix Support for additional guidance.

6. Once proper connection has been made, select the software file to upload to the AV-20-E by clicking “Open File” and selecting the previously downloaded software file as identified in Table 4. Note that you need to select “AV-20 Update Files” in the lower right corner.

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A confirmation dialog will appear with the filename and a calculated SHA1 hash. To confirm integrity of the file, compare the displayed SHA1 hash to that in Table 4. Note that the hash is not case sensitive.

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7. When confirmed, press OK and the main dialog will re-appear.

8. Press “Write Firmware” to begin the upload.
DO NOT POWER OFF THE AV-20-E OR CLOSE THE UPDATER TOOL UNTIL THE UPDATE IS COMPLETE.

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Figure 8-5 AV Update Tool

9. When the AV Update Tool displays “100%” and the lower status reads “Update Complete” the process is complete.
10. The unit will automatically restart. Upon restart of the unit, verify the startup screen indicates the updated software version.
THE SCREEN OF THE AV-20-E WILL GO BLACK WHILE THE DEVICE REBOOTS, THIS BEHAVIOR IS NORMAL AND THE STARTUP SCREEN WILL APPEAR AFTER REBOOTING.

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11. If the unit was removed to perform the update it can now be reinstalled as per the installation manual.
12. Any new wiring added for the update process should be properly secured.
13. If the XPDR CTRL page was disabled in step 4, re-enable it now and power cycle the AV-20-E.
14. Following the completion of update, follow Section 10 to perform required post-installation procedures.

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9 Troubleshooting

The following steps are to aid in identifying update issues:

Issue.

Possible Reason and Remedy

Update Tool

Disable Transponder – On SETUP screen, under PAGE ENABLE, turn off the XPDR page (red X). Re-enable it after the update.

Update Tool does not connect.

Check wiring. – AV-20-E must be powered separately from serial cable. Serial end of cable does not provide power. – Check pinouts. – Check signal ground wire.
Check COM port. – Does a new COM port get created when the cable is plugged into the USB port? Try another port or check for a Windows device driver problem. Follow cable manufacturer instructions. – Are you using the COM port associated with the USB cable? – Are you using the recommended USB cable? – Is another application using this COM port?

Unit has black screen after update

Update was interrupted before it could complete – Boot into bootloader mode as follows: – Press and hold bottom left and right buttons while powering up. – Hold for 10 seconds before releasing – Retry the update with the updater tool – Make sure power stays on during the update
Device settings may need to be reset – Hold upper and lower left buttons while powering up. – Release buttons after splash screen has cleared

Contact Product Support

Calibration Operations

Pitot Zero will not run

Device detects airborne condition based on vibration – Isolate the device from strong vibration sources like air data test sets, machinery, etc.

Airspeed trim will not run

Device detects airborne condition based on vibration – Isolate the device from strong vibration sources like air data test sets, machinery, etc.

Hard Calibration will not run

Device detects airborne condition based on airspeed – Run Pitot-Zero operation first, then retry hard Calibration – Calibrate airspeed trim, then retry

Altitude trim will not run

Device detects airborne condition based on airspeed – Run Pitot-Zero operation first, then retry altitude trim – Calibrate airspeed trim, then retry

Post-Update Operation

Transponder page On SETUP screen, under PAGE ENABLE, turn on the XPDR page (green

missing

checkmark).

VFR Squawk Code Using the skyBeacon phone/tablet application, check that the tailBeaconX has a

unexpected

default squawk code that is the desired VFR squawk code.

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10 Post-Accomplishment Verification and Actions
10.1 Verify Update Versions
On restart, verify that the startup screen displays the correct version number. Access the SETUP page to complete post-accomplishment verification steps.
1. Navigate to the SETUP page. 2. Press both left and right buttons simultaneously. 3. Highlight SYSTEM INFO with the up or down buttons on the left. 4. Enter the SYSTEM INFO screen by pressing the `SEL’ button on the
right. 5. If the SW VERSION displayed is 1.7.1, the update is verified.
If the new software version is not 1.7.1, contact uAvionix Support.

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11 System Checkout
Review the settings in the aircraft log book and verify that the AV-20-E settings are intact. Review the “AV-20-E Installation Manual” UAV1004048-001 Rev A §9 Instructions for Continued Maintenance & Operation prior to returning to service.
Version 1.7.1 and greater uses pitot-static data to assist the attitude algorithm. Performing the Air Data ­ Pitot Zero procedure found in the Installation Manual is particularly important.
It is strongly recommended to execute a Hard Cal calibration procedure, and to calibrate airspeed and altitude with an air data test set in addition to the Pitot-Zero.

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12 Support
For additional questions or support please visit: http://www.uavionix.com/support/

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13 Maintenance Record
When post-accomplishment verification and system checkout is completed, make appropriate entries in the Aircraft Maintenance Log Book.
Maintenance Record
Service Bulletin UAV-1007941-001 Rev A to install software v1.7.1 for AV20-E UAV-1003626-(___), has been complied with.
A copy of this form may be submitted by visiting: https://uavionix.com/logbook/

Date: Aircraft Information Make: Serial Number: AV-20-E Information Serial Number: Hardware Part Number: Customer Information Name: Email: Telephone:

By: Model: Registration Number:
UAV-1003626-_____

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References

• Patents - uAvionix
• uAvionix | Connecting Everything That Flies
• uAvionix | Connecting Everything That Flies
• Support - uAvionix
• Maintenance Record - uAvionix

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