Appareo STRATUS ESG User manual

This document and the information
contained herein are the property of
Appareo Systems, LLC and are
confidential. They may not be disseminated
or redistributed without the written
permission of Appareo Systems, LLC
APPAREO SYSTEMS, LLC
FARGO, NORTH DAKOTA 58102
Stratus ESG Maintenance Manual
DOCUMENT NUMBER
600845-000024
Document Type
Certification
Last Revised
8 June 2016
REV
1.4
Sheet
1 of 30
Maintenance Manual
Appareo Systems Stratus ESG System
SERIAL NUMBER:___________________
REGISTRATION NUMBER:____________

Stratus ESG Maintenance Manual
Rev: 1.4
Last Revised: June 8, 2016
Document Number: 600845-000024
Page 2 of 30
Stratus ESG Limited Warranty
When purchasing Stratus ESG (“Product”) manufactured by Appareo Systems, LLC
(“Appareo”), the original end user (“Initial Customer”) receives a limited warranty (Limited
Warranty) from Appareo. This Limited Warranty outlines the Initial Customer’s exclusive rights
and remedies as relates to the Product.
The Initial Customer receives an expressed limited warranty (referred to as the “Limited
Warranty”) for the Product purchased from Appareo. The terms of the Limited Warranty are
explained below. Additionally, State or Provincial law may adjust the terms of the Limited
Warranty, or the State or Province may impose additional obligations or additional “implied
warranties.” To the extent necessary to comply with those laws, the terms of the Limited
Warranty should be read to adjust to those requirements only to the extent necessary to comply
with such local law.
If you are the corporation or individual installing or using the Product, you are asked to read the
following terms and conditions carefully before installing or using this Product. By installing or
using the Product, you consent to be bound by and become a party to the Limited Warranty. If
you do not agree to the terms and conditions of the Limited Warranty, you should return the
Product for a full refund prior to installation.
PRODUCT LIMITED WARRANTY
Appareo warrants to you, the Initial Customer, that the Product will be free from defects in
material and workmanship for a period of time as indicated in the chart below from the Product
purchase date from Appareo or an authorized Appareo dealer, subject to the terms of this
Limited Warranty. Any Implied Warranty of Merchantability or for Fitness for a Particular
Purpose, if applicable to the Product, is limited in duration to the period of ownership by the
Initial Customer. This provision shall not create any Implied Warranty or Merchantability or of
Fitness for a Particular Purpose that would not otherwise apply to the Product.
Product Type
Warranty Period
For TSO Installed Stratus ESG
2 Years or 800 flight hours, whichever comes
first
For non-TSO Installed Stratus ESG
18 months from the date of purchase
For TSO Repaired or Newly Overhauled
Stratus ESG
6 Months or 200 flight hours, whichever
comes first
For non-TSO Repaired or Newly Overhauled
Stratus ESG
6 Months from the date of shipment from the
manufacturer
This Warranty is void if any part not supplied by Appareo is used in assembly or repair of the
Product, or if the Product has been altered.
EXCLUSIVE REMEDIES UNDER LIMITED WARRANTY
If the Product proves to be defective in material or workmanship during the Warranty Period,
and all Limited Warranty requirements have been met, your exclusive remedies, and Appareo’s
sole obligations, are that Appareo will repair or replace the Product under this Limited Warranty.

Stratus ESG Maintenance Manual
Rev: 1.4
Last Revised: June 8, 2016
Document Number: 600845-000024
Page 3 of 30
MAKING A LIMITED WARRANTY CLAIM
To make a Limited Warranty claim on your Product, you must do the following:
1. Call Appareo at [phone], write to Appareo at 1830 NDSU Research Circle North,
Fargo, ND 58102, or e-mail Appareo at s[email protected] and provide the Product’s serial
number and date of purchase.
2. Provide reasonable proof of purchase (for example, a sales receipt) that establishes you
as the Initial Customer (the original end-user consumer purchaser) and which provides evidence
that the Product was purchased within the warranty period of the event for which you are
making a claim for warranty service.
3. Appareo will provide you with a Return Materials Authorization number and shipping
information for the return of your unit.
4. Upon receipt of the returned Product, Appareo will inspect it and make a determination
as to validity of the warranty claim. Appareo will respond to you within 15 days of receipt of the
Product.
5. If upon examination it is determined that the Product is operating within factory
recommended specifications, you will be notified and may request that the Product be returned
to you. You will be asked to pay a reasonable service charge and also for shipping expenses to
and from Appareo.
6. If it is determined upon examination that the Product is not operating within factory
recommended specifications, but that the source of the failure was outside of the scope of this
Limited Warranty, you will be notified of the estimated cost for repair of the Product to factory
specifications. At this time you may request that the Product be returned to you without further
action or that Appareo repair the Product as per the provided estimate and return the product to
you. In this case you will be billed for the repairs and for shipping expenses to and from
Appareo.
7. If it is determined that the returned Product fall within the scope of this Limited Warranty,
Appareo will repair or replace the Product at its discretion. Replacement Product may be new or
factory refurbished at Appareo’s discretion, and shall carry the warranty of the original Product.
Following repair or replacement, Product shall be shipped to the same location in the same
manner as was the returned Product. Appareo shall pay all associated shipping expenses.
THE LIMITED WARRANTY DOES NOT APPLY UNLESS THE INITIAL CUSTOMER:
1. Has properly operated the Product.
2. Has installed and maintained the Product properly per any installation or maintenance
instructions provided.

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
Page 4 of 30
APPAREO DOES NOT COVER OR UNDERTAKE ANY LIABILITY IN ANY EVENT FOR ANY
OF THE FOLLOWING:
1. Loss of or damage to data, records, or software or the restoration of data or records, or
the reinstallation of software.
2. Damage from any circumstance described as excluded below with respect to the
product.
3. Damages from fire, flood, wind, rain, rising water, leakage or breakage of plumbing,
abuse, misuse or alteration of the product.
NO DEALER WARRANTY
This is the exclusive warranty applicable to Appareo Products. No dealer has any authority to
make any other warranty, modify, limit, or expand the terms of this Warranty in any fashion, or
to make any representation or promise on behalf of Appareo.
EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES
1. The sole and exclusive remedies of the Initial Customer are those provided by the
Limited Warranty. Appareo excludes any liability for personal injury under the Limited Warranty.
Appareo excludes any liability for direct, indirect, special, incidental or consequential damages,
whether for damage to or loss of property, loss of profits, business interruption, or loss of
information or data.
2. Danger: Do not use for medical or life support equipment or other high risk activities!
3. Appareo does not sell their Products for use in high-risk activities. The Product is not
designed or intended for use in hazardous environments requiring fail-safe performance or for
use in any circumstance in which the failure of the Product could lead directly to death, personal
injury, or severe physical or property damage, or that would affect operation or safety of any
medical or life support device (collectively “High Risk Activities”). Appareo expressly disclaims
any express or implied warranty of fitness for High Risk Activities. Appareo does not authorize
use of any of the Products in any High Risk Activities.
4. This Limited Warranty is governed by the laws of the United States and the State of
North Dakota, without reference to conflict of law principles.
5. Contact Information: Appareo’s address is 1830 NDSU Research Circle North, Fargo,
ND 58102. Their phone number is [phone]. Appareo is the warrantor under this Limited
Warranty. You may also contact Appareo on the Internet at www.appareo.com
6. CAUTION: Any changes or modifications not expressly approved by the warranty and/or
user documentation accompanying this device could void the user’s authority to operate the
equipment.

Stratus ESG Maintenance Manual
Rev: 1.4
Last Revised: June 8, 2016
Document Number: 600845-000024
Page 5 of 30
EXPORT REGULATIONS
Certain Appareo products are subject to export controls by the U.S. Department of Commerce
(DOC), under the Export Administration Regulations (EAR). Violation of U.S. law is strictly
prohibited. You agree to comply with the requirements of the EAR and all applicable
international, national, state, regional and local laws, and regulations, including any applicable
import and use restrictions.
For further information or clarification regarding these regulations please contact Appareo.

Stratus ESG Maintenance Manual
Rev: 1.4
Last Revised: June 8, 2016
Document Number: 600845-000024
Page 6 of 30
Record of Revisions
Revision
Number Change Description Effective Date Inserted By
1.0 Initial Release 5/29/2015 Angela Lorenz
1.1 CM 10304 1/05/2016 Angela Lorenz
1.2 CM 10612 2/15/2016 Angela Lorenz
1.3 CM 11328 5/11/2016 Angela Lorenz
1.4 Updated part number in Figure 1, updated commercial
part number for 37 Pin DSUB Connector in Table 6 6/08/2016 Angela Lorenz

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
Page 7 of 30
Table of Contents
List of Figures ............................................................................................................................ 9
List of Tables ............................................................................................................................. 9
Abbreviations and Definitions....................................................................................................10
Related Documentation.............................................................................................................11
1. INTRODUCTION...........................................................................................................12
1.1. PURPOSE...............................................................................................................12
1.2. CERTIFICATION INFORMATION...........................................................................12
1.3. SYSTEM DESCRIPTION ........................................................................................14
1.4. TOOLS....................................................................................................................15
1.5. WEIGHT AND BALANCE INFORMATION..............................................................15
1.6. EQUIPMENT DIMENSIONS....................................................................................16
1.7. ELECTRICAL SPECIFICATIONS............................................................................16
1.8. POWER REQUIREMENTS.....................................................................................16
2. AIRWORTHINESS LIMITATIONS.................................................................................17
3. INSPECTION REQUIREMENTS AND OVERHAUL (ATA CHAPTER 5).......................17
3.1. GENERAL INSPECTION INFORMATION...............................................................17
4. DIMENSIONS AND ACCESS (ATA CHAPTER 6).........................................................18
4.1. COMPONENT LOCATIONS....................................................................................18
4.2. MAINTENANCE INSTRUCTIONS...........................................................................18
4.3. FUNCTIONAL TESTS.............................................................................................21
5. LIFTING AND SHORING (ATA CHAPTER 7)................................................................23
5.1. LIFTING INFORMATION.........................................................................................23
5.2. SHORING INFORMATION......................................................................................23
6. LEVELING AND WEIGHING (ATA CHAPTER 8)..........................................................24
6.1. LEVELING INFORMATION.....................................................................................24
6.2. WEIGHING INFORMATION....................................................................................24
7. TOWING AND TAXIING (ATA CHAPTER 9).................................................................24
7.1. TOW INSTRUCTIONS............................................................................................24
7.2. TAXIING INSTRUCTIONS ......................................................................................24
8. PARKING, MOORING AND STORAGE (ATA CHAPTER 10) .......................................24
8.1. MOORING INFORMATION.....................................................................................24
8.2. PARKING INFORMATION......................................................................................24
8.3. STORAGE LIMITATIONS .......................................................................................24

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
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9. PLACARDS AND MARKINGS (ATA CHAPTER 11)......................................................24
10. SERVICING (ATA CHAPTER 12)..................................................................................25
10.1. SERVICING INFORMATION...................................................................................25
10.2. LUBRICATION INFORMATION ..............................................................................27
10.3. EQUIPMENT REQUIRED FOR SERVICING ..........................................................27
10.4. CONSUMABLE MATERIALS..................................................................................27
11. WIRING DIAGRAMS.....................................................................................................28

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
Page 9 of 30
List of Figures
Figure 1: Stratus ESG installation diagram................................................................................18
Figure 2: Locking mechanism location ......................................................................................19
Figure 3: Software update wiring diagram.................................................................................20
Figure 4: Interface for Stratus ESG functional tests...................................................................22
Figure 5: Pin-out .......................................................................................................................28
Figure 6: Stratus ESG wiring diagram with parallel altitude encoder .........................................29
Figure 7: Stratus ESG wiring diagram with serial altitude encoder ............................................30
List of Tables
Table 1: TSO/FCC compliance .................................................................................................12
Table 2: TSO deviations............................................................................................................13
Table 3: Criticality level .............................................................................................................13
Table 4: Software......................................................................................................................14
Table 5: Required hardware (LRUs)..........................................................................................14
Table 6: Required hardware (COTS components) ....................................................................15
Table 7: Required tools.............................................................................................................15
Table 8: Stratus ESG weight.....................................................................................................15
Table 9: Equipment dimensions................................................................................................16
Table 10: Electrical specifications .............................................................................................16
Table 11: Power requirements..................................................................................................16
Table 12: Scheduled maintenance............................................................................................17
Table 13: Troubleshooting guide...............................................................................................27

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
Page 10 of 30
Abbreviations and Definitions
Abbreviation Term Definition
CFR Code of Federal
Regulations
Codification of the general and permanent rules
and regulations published in the Federal
Register by the executive departments and
agencies of the United States Federal
government.
DER
Designated
Engineering
Representative
A representative appointed by the FAA to
oversee specific parts of an FAA project.
ESG
Part of the marketing name for Stratus ESG.
FAA Federal Aviation
Administration
Agency of the United States Department of
Transportation with authority to regulate and
oversee all aspects of civil aviation in the
United States.
Gb Gigabit
Unit of information or computer storage equal
to 1,000,000,000 bits (equal to 125
megabytes).
GPS Global Positioning
System
A system used to identify the longitude, latitude
and in some instances the altitude of a given
object.
Hz Hertz
Unit of frequency based upon cycles per
second.
PMA Parts Manufacturer
Approval
Combined design and production approval from
the FAA for modification and replacement
parts. It allows a manufacturer to produce and
sell these parts for installation on type
certificated products. The approval procedures
for FAA personnel and guidance for PMA
applicants is outlined in FAA Order 8110.42.
STC Supplemental Type
Certification
Type Certificate issued when an applicant has
received FAA approval to modify an aircraft
from its original design.
TSO Technical Standard
Order
Minimum performance standard for specified
materials, parts, and appliances used on civil
aircraft (FAA definition).
WAAS Wide Area
Augmentation System
System of ground-based antennas whose
precisely known locations are used to correct
satellite signals and provide greater positional
and integrity of service to aircraft in flight.

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
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Related Documentation
Document Number Title
600840-000031 Stratus ESG Installation Instructions
600890-000049 Stratus ESG Pilot’s Guide
601837-000024 Stratus ESG Installation Drawings and Wiring Diagrams

Stratus ESG Maintenance Manual
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Last Revised: June 8, 2016
Document Number: 600845-000024
Page 12 of 30
1. INTRODUCTION
1.1. PURPOSE
This Maintenance Manual describes the recommended and required maintenance practices to
maintain the Appareo Systems Stratus ESG system.
Electronic media or hard copy revisions/updates to this document will be made available to all
owners if contact information is provided to the manufacturer. Aircraft owners are encouraged to
provide up-to-date information to ensure timely access to new information. You can contact the
manufacturer at:
Appareo Systems, LLC
1830 NDSU Research Circle North
Fargo, ND 58102
To view the most current version of this document, go to www.appareo.com/dealer-portal.
All structural and general maintenance must be performed in accordance with the aircraft’s
Standard Practices Manual and FAA AC 43.13-1B.
1.2. CERTIFICATION INFORMATION
1.2.1. TSO/FCC compliance
TSO
Stratus ESG is compliant with the following Technical Standard Orders:
Reference/Issue Title
FAA TSO-C112e
Technical Standard Order: Air Traffic Control Radar Beacon
System/Mode Select (ATCRBS / Mode S) Airborne Equipment
FAA TSO-C145d
Technical Standard Order: Airborne Navigation Sensors Using The
Global Positioning System
FAA TSO-C166b
Technical Standard Order: Extended Squitter Automatic Dependent
Surveillance – Broadcast (ADS-B) and Traffic Information Service –
Broadcast (TIS-B) Equipment Operating on the Radio Frequency of
1090 Megahertz (MHz)
Table 1: TSO/FCC compliance
FCC
Stratus ESG has an FCC ID of 2AETC-1505005.

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1.2.2. TSO deviations
TSO Section Deviation
TSO-C145d
Section 3, Subpart D
Environmental qualification testing was
performed to DO-160G, not DO-160E.
Table 2: TSO deviations
1.2.3. Non-TSO functions
Below are Stratus ESG’s non-TSO functions:
•VFR key (and configuration).
This non-TSO function does not interfere with Stratus ESG’s compliance with the requirements
of the TSOs listed in Section 1.2.1.
1.2.4. Environmental qualifications
Stratus ESG is tested to DO-160G. The Stratus ESG Environmental Qualification form is found
in Appendix A of the Stratus ESG Installation Instructions (600840-000031).
1.2.5. Criticality level
Software level determination is based on the Functional Hazard Assessment (FHA) and
Preliminary System Safety Assessment (PSSA). These assessments determined that the most
severe failure conditions (see Table 1) are classified as Major. As such, the Software Assurance
Level has been determined to be Major.
Major failure conditions would reduce the capability of the aircraft or the ability of the crew to
cope with adverse operating conditions to the extent that it would be a significant reduction in
safety margins or functional capabilities or a significant increase in crew workload. Software
whose anomalous behavior would cause or contribute to a failure of the system function
resulting in a Major failure condition for the aircraft is identified as Level C.
Function Description Classification
ATCRBS / Mode S
Transponder
Malfunction of the ATCRBS / Mode S
transponder function without warning
Major
ADS-B Out
Broadcast of incorrect ADS-B messages
without warning
Major
GPS/SBAS Receiver
Loss or malfunction of the GPS/SBAS receiver
function
Major
Pressure Altitude Output
Failure of the pressure altitude output function
Major
RF Feed-Through
Malfunction of the RF feed-through function
without warning
Major
Table 3: Criticality level

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Document Number: 600845-000024
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1.3. SYSTEM DESCRIPTION
Stratus ESG by Appareo is a panel-mounted level 2els Class 1 Extended Squitter transponder.
It is a Class B1S transponder which is ADS-B Out compliant. To support the ADS-B Out
function, Stratus ESG contains a Class Beta 1 GPS/WAAS receiver. Stratus ESG responds to
legacy Mode A/C interrogations and Mode S interrogations from both ground radar and airborne
collision avoidance systems.
1.3.1. Operation of Stratus ESG
See the Stratus ESG Pilot’s Guide (600890-000049) for a full description of Stratus ESG’s
function.
1.3.2. Embedded Hardware and Software
The embedded hardware and software information listed below is current as of the time of
publication of this document.
Description Part number Revision
(or later FAA approved)
Embedded Hardware (FPGA)
501010-000109
R04
Software (DSC)
501010-000113
R04
Table 4: Software
Refer to Section 4.2.3 for software/embedded hardware update procedures.
1.3.3. Stratus ESG parts catalog
The following parts are required for the installation of Stratus ESG.
Line Replaceable Units (LRUs):
Item Appareo Part
Number Commercial Part Number Quantity
Backplate
153510-000015
-
1
Transponder
153510-000017
-
1
Stratus ESG Rack
153540-000027
-
1
RF TNC Pass Through Adapter
251015-000077
-
1
RF BNC Pass Through Adapter
251015-000078
-
1
Table 5: Required hardware (LRUs)

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COTS components:
Item Appareo Part
Number Commercial Part Number Quantity
#6-32 x 100° Flat Head SS
Screw
-
MS24693, AN507R or
other approved fastener
6
Replacement pins
-
M39029/63-368
-
37 Pin DSUB Connector
251015-000074
M24308/2-4F
1
Screw
356060-000007
-
6
Strain Relief Backshell
356070-000006
M85049/48-1-4F
1
Table 6: Required hardware (COTS components)
Stratus ESG also requires input from a GPS antenna, transponder antenna, and altitude
encoder. See Stratus ESG Installation Instructions (600840-000031) for antenna and altitude
encoder requirements.
1.4. TOOLS
The following tools may be needed for maintenance of Stratus ESG.
Tool Part Number Used For
3/32” hex driver
Securing locking mechanism
through the face plate
External retaining ring pliers
RF pass through adapter
Crimp tool
M22520/2-01
DSUB pins
Positioner
M22520/2-08
DSUB pins
Insertion/extraction tool
M81969/39-01
DSUB pins
Table 7: Required tools
1.5. WEIGHT AND BALANCE INFORMATION
The total weight of the Stratus ESG system and related hardware is less than 4 lbs. Compute a
Chart “C” in accordance with the table below, noting the proper aircraft station to obtain balance
information.
Component Weight
Stratus ESG Unit Weight
2.75 lbs. (1.25 kg)
Stratus ESG Total Installed Weight
(Transponder, rack, and connectors)
3.29 lbs. (1.49 kg)
Table 8: Stratus ESG weight

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1.6. EQUIPMENT DIMENSIONS
Dimensions for Stratus ESG are outlined in the table below. All figures given are representative
of maximum equipment dimensions (where applicable).
Characteristic Specification
Bezel Width
6.38 inches (162 mm)
Bezel Height
1.69 inches (43 mm)
Rack Width
6.32 inches (160.4 mm)
Rack Height
1.65 inches (42 mm)
Depth from back of bezel to end of strain relief on rack
(not compensating for wire bend radius)
10.75 inches (273 mm)
Table 9: Equipment dimensions
1.7. ELECTRICAL SPECIFICATIONS
Characteristic Specification
Altitude
Up to 25,000 ft
External Suppression Input
Low ≤0.5 V
High ≥5 V (suppressed)
Mode A Capability
4096 Identification Codes
Mode C Altitude Capability
Parallel altitude encoder: up to 62,700 ft
Serial altitude encoder: up to 126,700 ft
Mode S Capability
Parallel altitude encoder: up to 62,700 ft
Serial altitude encoder: up to 126,700 ft
Operational Temperature Range
-20°C to +55°C
Receiver Frequency
1030 MHz
Receiver Sensitivity
-74 dBm nominal for 90% replies
Transmitter Frequency
1090 MHz ± 1 MHz
Transmitter Power
310 Watts nominal
Table 10: Electrical specifications
1.8. POWER REQUIREMENTS
Characteristic Specification
Input Voltage Range
11 to 36 Vdc
Nominal Current Draw
0.28 A at 28 Vdc
0.5 A at 14 Vdc
Power Input
8 W Typical
59.5 W Max
Table 11: Power requirements

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2. AIRWORTHINESS LIMITATIONS
This Airworthiness Limitations section is FAA approved and specifies inspections and other
maintenance required under §43.16 and §91.403 of the Federal Aviation Regulations unless an
alternate program has been FAA approved.
There are no airworthiness limitations associated with this type design change.
3. INSPECTION REQUIREMENTS AND OVERHAUL (ATA
CHAPTER 5)
Requirement
Inspection
Special Inspection
Inspection Term
1. Inspect Stratus ESG for damage.
NOTE: 1, 2, 3
12 months
2. Inspect Stratus ESG wiring and connectors for
security.
NOTE: 1, 2, 3
12 months
3. Inspect Stratus ESG connector contacts and
attachment hardware for corrosion.
NOTE: 2
12 months
4. Clean Stratus ESG.
As necessary
5. In accordance with 14 CFR 91.411 and 91.413,
inspect and test Stratus ESG for the interface with
each static pressure system, altimeter instrument,
automatic pressure altitude reporting system, or
any other integrated system using the tests and
specifications in 14 CFR Part 43, Appendix E
and F.
24 months
Or
Any maintenance
performed on
integrated systems
including maintenance
performed on Stratus
ESG where data
correspondence error
could be introduced
Table 12: Scheduled maintenance
NOTES:
1) This item requires inspection following a hard landing event.
2) This item requires inspection following a lightning strike event.
3) This item requires inspection following a propeller strike event.
3.1. GENERAL INSPECTION INFORMATION
Removal and installation instructions are found in this document. Manufacturer’s installation
manuals and basic aircraft maintenance manuals should be used for additional reference
material. Component maintenance must be completed by an authorized repair facility. Refer to
Section 10: Servicing. If for any reason during inspection Stratus ESG fails inspection or is
otherwise not working properly, read the instructions contained in this manual before removing
any Stratus ESG components. If difficulty is encountered, seek assistance by contacting the
manufacturer.

Stratus ESG Maintenance Manual
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4. DIMENSIONS AND ACCESS (ATA CHAPTER 6)
4.1. COMPONENT LOCATIONS
Stratus ESG: Stratus ESG is panel mounted.
GPS antenna: Typical GPS antenna installation locations are on the top of the aircraft or on the
empennage with consideration for line of sight with satellites.
Transponder antenna: The transponder antenna should be mounted vertically on the bottom of
the aircraft.
Altitude encoder: The altitude encoder should be installed using the manufacturer’s
instructions and recommendations.
4.2. MAINTENANCE INSTRUCTIONS
The following instructions are in addition to the standard practices used to maintain the aircraft
structure, the wiring described in the aircraft manufacturer’s maintenance manual, and FAA
Advisory Circular 43.13-1B.
4.2.1. Stratus ESG System Removal
STRATUS ESG TRANSPONDER
153510-000017
STRATUS ESG RACK
153540-000027
BACK PLATE W/ DSUB
AND RF CONNECTORS
Figure 1: Stratus ESG installation diagram

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Figure 2: Locking mechanism location
To remove the Stratus ESG assembly:
Turn the 3/32 hex wrench counter-clockwise on the locking mechanism through the front of
Stratus ESG to loosen the lock until the transponder comes loose. Pull out Stratus ESG.
4.2.2. Stratus ESG System Replacement
To replace the Stratus ESG assembly:
1. Adjust the locking mechanism on Stratus ESG using a 3/32 hex wrench so that
the front lobe is in a vertical position. Insert the unit into the mounting rack until
the faceplate is flush with the front end of the rack.
2. Tighten the locking mechanism with the 3/32 hex wrench until it is tight and the
connectors have mated. Do not overtighten. If the mechanism will not tighten,
verify that Stratus ESG is properly seated in the rack.
NOTE: Conduct the applicable functional tests in Section 4.3 after replacing the Stratus ESG
assembly.
4.2.3. Software Update
The following equipment is required to perform a software update:
•Portable computer with Windows operating system
•Stratus ESG Software Update Tool desktop software (See Step 4)
•Stratus ESG software/embedded hardware update (See Step 4)
•3 amp power supply
•D-sub wiring harness
•Serial to USB adapter (optional)

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To perform a software/embedded hardware update, complete the following steps:
1. Use the following diagram to wire the transponder for a software update.
NOTES:
SOME DETAIL IS REMOVED FOR CLARITY
1 UNLESS OTHERWISE SPECIFIED, ALLWIRING TO BE DONE WITH 22 AWG WIRING
STRATUS ESG
AIRCRAFT POWER 1
AIRCRAFT GND 1
SOFTWARE UPDATE ENABLE
RS232-RX MAINTENANCE
RS232-TX MAINTENANCE
AUX GND
2
1
8
3
22
18
11-33 VDC (Min 3A power Supply)
P1001
COMPUTER
OUT
IN SERIAL PORT
GND
Figure 3: Software update wiring diagram
2. Plug the serial port connector into the computer. A serial to USB adapter may be
required. If the adapter requires you to install drivers, install them.
3. Power on Stratus ESG. It will enter into software update mode.
NOTE: The screen will be black, but the keypad will illuminate.
4. Apply the software/embedded hardware update.
a. Download the Stratus ESG Update Tool and update file, if you have not
already done so.
i. Navigate to the http://appareo.com/experimental
ii. Download the Stratus ESG Update Tool. When prompted, install
the software by following the on-screen prompts.
iii. Download the update file and save the file to your desktop.
b. Open the Stratus ESG Update Tool.
c. Click the box below “Update File” and navigate to the update file that was
downloaded in Step 4.a.iii.
d. Use the “Port” drop-down menu to select the computer port that is
connected to Stratus ESG.