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GTX 327 Installation Manual

Page 3-1

190-00187-02

Revision K

3

INSTALLATION PROCEDURE

3.1

Unpacking Unit

Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred
during shipment. If the unit is damaged, notify the carrier and file a claim. To justify a claim, save the
original shipping container and all packing materials. Do not return the unit to Garmin until the carrier
has authorized the claim.

Retain the original shipping containers for storage. If the original containers are not available, a separate
cardboard container should be prepared that is large enough to accommodate sufficient packing material
to prevent movement.

3.2

Electrical Connections

All electrical connections, except for the antenna and shield ground, are made through a single, 25 pin
D-subminiature connector (see Figure 4-1). The card-edge connector may be used to terminate shield
grounds to the GTX 327 back plate. Table 4-1 lists the electrical connections of all input and output
signals. See Appendix C for interconnect wiring diagrams and cable requirements for each signal.
Required connector and associated hardware are supplied in the connector kit (P/N 011-00651-01).

CAUTION

Check wiring connections for errors before inserting the GTX 327 into
the rack. Incorrect wiring could cause internal component damage.

Table 3-1. Pin Contact Part Numbers

25 pin D-Subminiature connector (P3271)

Manufacturer

16 AWG

(Power Only)

18 AWG

(Power Only)

20 AWG

22-28 AWG

Garmin P/N

336-00044-01

336-00044-00

336-00044-02

336-00021-00

Military P/N

N/A

N/A

N/A

M39029/58-360

AMP

N/A

N/A

N/A

204370-2

Positronic

N/A

N/A

N/A

MC8522D

ITT Cannon

N/A

N/A

N/A

030-2042-000

Table 3-2. Recommended Crimp Tools

16, 18 & 20 AWG

22-28 AWG

Manufacturer

Hand

Crimping Tool

Positioner

Insertion/

Extraction Tool

(note 2)

Positioner

Insertion/

Extraction

Tool

Military P/N

M22520/2-01

N/A

M81969/1-04

M22520/2-09

M81969/1-04

Positronic

9507

9502-11

M81969/1-04

9502-3

M81969/1-04

ITT Cannon

995-0001-584

N/A

N/A

995-0001-
739

N/A

AMP

601966-1

N/A

91067-1

601966-6

91067-1

Daniels

AFM8

K774

M81969/1-04

K42

M81969/1-04

Astro

615717

N/A

M81969/1-04

615725

M81969/1-04

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Summary of Contents for GTX 327

Page 1: ... Garmin International Inc 190 00187 02 Revision K January 2005 GTX TM 327 TRANSPONDER INSTALLATION MANUAL ...

Page 2: ...rnational Inc 1200 E 151 st Street Olathe KS 66062 USA Telephone 913 397 8200 Aviation Dealer Technical Support Line Toll Free 888 606 5482 www garmin com Garmin Europe Ltd Unit 5 The Quadrangle Abbey Park Industrial Estate Romsey SO51 9DL U K Telephone 44 0870 851241 RECORD OF REVISIONS Revision Revision Date Description ECO A 01 19 00 Initial Release 12550 B 02 28 00 Update Configuration Procedu...

Page 3: ...ted released or disclosed to foreign nationals inside or outside of the United States without first obtaining an export license A violation of the EAR may be subject to a penalty of up to 10 years imprisonment and a fine of up to 1 000 000 under Section 2410 of the Export Administration Act of 1979 Include this notice with any reproduced portion of this document WARNING This product its packaging ...

Page 4: ...Page ii GTX 327 Installation Manual Revision K Preliminary 190 00187 02 This page intentionally left blank ...

Page 5: ...TION OVERVIEW 2 1 2 1 Introduction 2 1 2 2 Installation Material 2 1 2 3 Installation Considerations 2 2 2 4 Antenna Installation 2 2 2 5 Cabling and Wiring 2 3 2 6 Installation Approval Considerations for Pressurized Aircraft 2 5 2 7 Cooling Air 2 6 2 8 GTX 327 Installation 2 6 3 INSTALLATION PROCEDURE 3 1 3 1 Unpacking Unit 3 1 3 2 Electrical Connections 3 1 3 3 Circuit Breaker Placard 3 2 3 4 P...

Page 6: ...ALLATION CONFIGURATION CHECKOUT PROCEDURE 5 1 5 1 Operation 5 1 5 2 Configuration Pages 5 4 APPENDIX A CERTIFICATION DOCUMENTS A 1 Continued Airworthiness A 1 A 2 Environmental Qualification Forms GTX 327 Transponder A 1 APPENDIX B ASSEMBLY AND INSTALLATION DRAWINGS APPENDIX C INTERCONNECT DRAWINGS ...

Page 7: ... Assembly Drawing B 3 B 3 GTX 327 Recommended Panel Cutout Dimensions B 5 C 1 GTX 327 to 400 500 Series Units Typical Interconnect Wiring Diagram C 1 C 2 GTX 327 to GNS 480 CNX80 Typical Interconnect Wiring Diagram C 3 C 3 Dual TXP Interconnect Wiring Diagram Encoding Altitude Connections C 5 LIST OF TABLES TABLE PAGE 3 1 Pin Contact Part Numbers 3 1 3 2 Recommended Crimp Tools 3 1 3 3 Unit Power ...

Page 8: ...in date and the purpose of the modification The table is current at the time of publication of this manual see date on front cover and is subject to change without notice Authorized Garmin Sales and Service Centers are encouraged to access the most up to date bulletin and advisory information on the Garmin Dealer Resource web site at www garmin com using their Garmin provided user name and passwor...

Page 9: ...ndspeed on ATC radar screens or TCAS traffic indicators The GTX 327 is equipped with IDENT capability that activates the Special Position Identification SPI pulse for 18 seconds The GTX 327 is configured with all key controls The layout of the front panel keys and displays segregates the transponder s primary functions from the secondary timing functions The unit can be configured so the aircraft ...

Page 10: ...ent on board may be suppressed by the transponder This feature is designed to limit mutual interference 1 4 Interface Summary The GTX 327 provides the following interface connections via the rear connector Ten 10 encoding altimeter inputs External IDENT input External STBY input useful for dual transponder installations External suppression pulse input Switched power output of up to 1 5 amps for d...

Page 11: ...ents FAA TSO C74c JTSO C74c RTCA DO 160D Unit Software RTCA DO 178B Level D Temperature Range 20 C to 55 C Continuous Operation Power Requirements 11 0 to 33 0 Vdc Power Input 15 Watts typical 22 Watts Maximum Humidity 95 55 C for 16 hours 85 38 C for 32 Hours Altitude 50 000 Feet Transmitter Frequency 1090 MHz Transmitter Power 125 Watts minimum 150 Watts nominal at the antenna through 1 5 dB coa...

Page 12: ...atts Typical 45 Watts Maximum Maximum Full TSO Reply Rate 1200 PRF Code 7777 0 95 A 27 5 Vdc 1 85 A 13 75 Vdc Maximum Quiescent 0 50 A 27 5 Vdc 0 90 A 13 75 Vdc 1 6 Installation Approval The conditions and tests required for TSO approval of this article are minimum performance standards It is the responsibility of those installing this article either on or within a specific type or class of aircra...

Page 13: ...ion for Aircraft Radio Station License The FCC also has a fax on demand service to provide forms by fax The GTX 327 owner accepts all responsibility for obtaining the proper licensing before using the transponder CAUTION The UHF transmitter in this equipment is guaranteed to meet federal communications commission acceptance over the operating temperature range Modifications not expressly approved ...

Page 14: ...M THE USE MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT Some states do not allow the exclusion of incidental or consequential damages so the above limitations may not apply to you Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMED...

Page 15: ...alog Part Number Unit Part Number Front Panel Color With Install Kit Docs 010 00188 00 011 00490 00 Black No 010 00188 03 011 00490 00 Black Yes 010 00188 10 011 00490 10 Gray No 010 00188 12 011 00490 10 Gray Yes Note Documentation includes pilot s guide and warranty registration card 2 2 2 Equipment Available Item Garmin P N Mounting Rack GTX 327 115 00431 00 Sub Assy Connector Kit GTX 327 011 0...

Page 16: ...ial or parallel gray code format 2 3 Installation Considerations The GTX 327 can interface with equipment including altimeters and Air Data Computer ADC RS 232 and ARINC 429 provide a serial communication path between interfacing equipment Fabrication of a wiring harness is required Optional available discrete line interfaces are described in Section 4 3 Discrete Inputs and shown in installation d...

Page 17: ... In cases where some installations have more than one unit sharing a common circuit breaker sizing and wire gauge is based on aircraft circuit breaker layout length of wiring current draw of units and internal unit protection characteristics Do not attempt to combine more than one unit on the same circuit breaker unless it is specified on aircraft manufacturer approved drawings In some cases a lar...

Page 18: ...0 W Franklin Drive Franklin WI 53132 Tel 800 327 9473 414 421 5300 Fax 414 421 5301 www ecsdirect com See current issue of Qualified Products List QPL 17 RG types are obsolete and are shown for reference only replaced by M17 type numbers 2 5 1 Cable Routing Considerations When routing cables observe the following precautions All cable routing should be kept as short and as direct as practical Avoi...

Page 19: ...alternatives 1 Obtain approved antenna installation design data from the aircraft manufacturer 2 Obtain an FAA approved Supplemental Type Certificate STC pertaining to and valid for the subject antenna installation 3 Contact the FAA Aircraft Certification Office in the appropriate Region and request identification of FAA Designated Engineering Representatives DERs who are authorized to prepare and...

Page 20: ...onder once every 5 to 10 seconds for approximately 100 msec at a 400 PRF rate In very high traffic areas with multiple ground stations and TCAS traffic it is possible to have long term PRF rates above 450 PRF The GTX 327 measures the unit temperature and without forced air cooling the reply rate will be reduced to protect the transmitter from overheating 2 8 GTX 327 Installation 2 8 1 Viewing Angl...

Page 21: ...rackets are not supplied due to the wide range of mounting configurations available Suitable mounting brackets may be fabricated from sheet metal or angle stock To insure a sturdy mount rear support for the unit must be provided 2 Looking at the bottom of the transponder make sure the front lobe of the locking mechanism is in a vertical position This can be accomplished by using a 3 32 Allen wrenc...

Page 22: ...Page 2 8 GTX 327 Installation Manual Revision K 190 00187 02 This page intentionally left blank ...

Page 23: ...ctions of all input and output signals See Appendix C for interconnect wiring diagrams and cable requirements for each signal Required connector and associated hardware are supplied in the connector kit P N 011 00651 01 CAUTION Check wiring connections for errors before inserting the GTX 327 into the rack Incorrect wiring could cause internal component damage Table 3 1 Pin Contact Part Numbers 25 ...

Page 24: ...ector when using an extractor due to the absence of the wire A new contact must be used when reassembling the connector 3 3 Circuit Breaker Placard Install a Circuit Breaker Placard labeled Transponder or Transponder 1 Transponder 2 as appropriate as indicated in AC 43 13 2A paragraph 27c 4 3 4 Post Installation Configuration and Checkout After the installation is complete refer to Section 5 for s...

Page 25: ... C4 In 8 EXTERNAL IDENT INPUT In 9 ALTITUDE B1 In 10 ALTITUDE C1 In 11 ALTITUDE B2 In 12 ALTITUDE B4 In 13 POWER GROUND 14 SWITCHED POWER OUTPUT Out 15 POWER INPUT 11 TO 33 VDC In 16 EXTERNAL STANDBY In 17 EXTERNAL SUPPRESSION I O I O 18 ALTITUDE D4 In 19 RS 232 IN 1 In 20 RS 232 OUT 1 Out 21 RESERVED FOR SOFTWARE UPLOAD 22 AIRBORNE SENSE SQUAT SWITCH In 23 28 VDC PANEL LIGHTING INPUT In 24 14 VDC...

Page 26: ...1 1 Aircraft Power Table 4 2 Aircraft Power Pin Assignments Pin Name Pin Number I O AIRCRAFT POWER 1 15 In SWITCHED POWER OUT 14 Out POWER GROUND 13 SIGNAL GROUND 25 4 1 2 Lighting Bus The GTX 327 unit can be configured to track a 28 Vdc 14 Vdc 5 Vdc or 5 Vac lighting bus using these inputs The GTX 327 can also automatically adjust for ambient lighting conditions based on the photocell Refer to se...

Page 27: ...ial data the unit selects only one for use at a time with serial data input receiving the highest priority For altimeters that can be connected in both serial data and parallel gray code format such as the Garmin GAE 43 Garmin P N 013 00066 00 select one or the other but not both wiring connections When connecting two GTX 327 transponders to a GPS the unit can only receive RS 232 serial data from ...

Page 28: ...327 searches in this sequence for altitude and stops when it finds a valid pressure altitude input Altitude reporting equipment order of precedence 1 RS 232 data from GNS 480 CNX80 2 RS 232 Fuel Air Data Computer if configured W ALT 3 Parallel wire Gray Code input 4 Shadin Altitude Serializer Encoder 5 Icarus Altitude Serializer Encoder Only approved devices may provide altitude to the GTX 327 in ...

Page 29: ...sing airborne status Input for Airborne Determination allows automatic start and stop of the flight timer and enables automatic STBY mode selection Refer to Figure C 2 for the squat switch interconnect and Sections 5 2 6 2 and 5 2 10 for squat switch configuration EXTERNAL STANDBY SELECT remote STBY is an ON or OFF input used typically for dual transponder installations When grounded the GTX 327 i...

Page 30: ...ions NOTE The installation of an optional software upgrade connector is highly recommended If the connector is wired in the aircraft transponder removal and reinstallation for software upgrade is not required When the GTX 327 is installed in an aircraft an optional RS 232 serial data connector should be installed for future software upgrades negating the need to remove the transponder from the air...

Page 31: ... not respond to radar or TCAS interrogations When liftoff is sensed the unit automatically selects the ALT mode 5 1 1 Function Selection Switches The function selection switches are OFF Powers off the GTX 327 Pressing the STBY ON or ALT key powers on the transponder displaying the last active identification code STBY Selects the standby mode When in standby mode the transponder will not reply to a...

Page 32: ...nd Count Down timers In the Configuration mode steps through the function pages Pressure Alt Displays the altitude data supplied to the GTX 327 in feet flight level format or meters depending on configuration setup Flight Time Displays the Flight Time which is controlled as configured on Configuration 1 page Count Up Timer Controlled by START STOP and CLR buttons Count Down Timer Controlled by STA...

Page 33: ...election is done with eight keys 0 7 that provide 4 096 active identification codes Pushing one of these keys begins the code selection sequence The new code is not activated until the fourth digit is entered Pressing the CLR key moves the cursor back to the previous digit Pressing the CLR key when the cursor is on the first digit of the code or pressing the CRSR key during code entry removes the ...

Page 34: ... for normal operation 5 2 1 DISPLAY MODE Page DISPLAY MODE Selection Description AUTO Automatic DEFAULT The display will automatically change between Positive mode during the day and Negative mode at night depending on the ambient light level received by the photocell NGTV Negative The display will always be light characters on a black background regardless of ambient lighting PSTV Positive The di...

Page 35: ...tion PHOTO Photocell DEFAULT Backlight level is determined by the ambient light level as measured by the photocell on the GTX 327 14V Backlight level tracks a 14 Volt DC aircraft lighting bus 28V Backlight level tracks a 28 Volt DC aircraft lighting bus 5V Backlight level tracks a 5 Volt DC aircraft lighting bus NOTE If a lighting bus any selection other than PHOTO is selected and the lighting bus...

Page 36: ... lighting The higher the number the brighter the minimum brightness Key lighting minimum brightness has a range of 0 zero to 99 and is set to 8 at the factory It is prudent to verify that key lighting characteristics match those of other equipment in the panel under night lighting conditions KEY SRCE Key Lighting Source Auto Only Selection Description PHOTO Photocell DEFAULT Key lighting level is ...

Page 37: ...entered in the contrast level adjustment described below CONTRAST LEVEL ADJUSTMENT This is a slider bar graph control Use the 8 key to move it further to the left decreasing the contrast level Use the 9 key to move it to the right increasing the contrast level It is set to 50 at the factory In manual contrast mode this is a direct adjustment of the display contrast level In automatic contrast mode...

Page 38: ...00 200 2000 ADC W ALT RS 232 serial air data information from Shadin ADC 200 200 2000 plus altitude data SHADIN ALT RS 232 serial altitude from Shadin 8800T 9000T 9200T FADC NO ALT RS 232 serial air data from Shadin 9628XX X family of Air Data Computers and Fuel Air Data Computers FADC W ALT RS 232 serial air data from Shadin 9628XX X family of Air Data Computers and Fuel Air Data Computers plus a...

Page 39: ...ntrolled manually by the pilot CLEAR DEFAULT Automated flight timer START STOP resets to zero at every lift off ACCUMULATE Automated flight timer START STOP continues counting up at lift off VFR ID VFR Transponder Code This field is the four digit code that will be selected when the user presses the GTX 327 VFR key In the United States 1200 is the VFR code for any altitude Many European countries ...

Page 40: ... or airspeed switch is open when the aircraft is on the ground and low grounded when airborne AUTO STANDBY Selection Description OFF Selection of STBY standby and ALT altitude reporting modes is initiated manually by the pilot ON DEFAULT The GTX 327 will automatically transition from STBY to ALT when the unit determines the aircraft has become airborne When the unit determines the aircraft has bee...

Page 41: ...ALT is selected as an input pressure altitude PALT can be viewed If SHADIN FADC or SHADIN ADC is selected as an input true or static air temperature SAT outside or total air temperature TAT indicated air speed IAS true air speed TAS density altitude DALT pressure altitude PALT current barometric pressure BARO and vertical speed VSPD can be viewed 5 2 9 GRAY CODE INPUT Page Information on this page...

Page 42: ...e SQUAT SWITCH input is active the aircraft is on the ground as configured on the Second Configuration page 5 2 11 ANALOG INPUT Page The Analog to Digital Converter ADC counts are shown on the display providing troubleshooting data There are no user inputs or operations on this page 14 5V LTG Displays the current 14 Volt lighting bus ADC level PHOTO Displays the current photocell ADC level LCD TEM...

Page 43: ...Page A 1 190 00187 02 Revision K APPENDIX A CERTIFICATION DOCUMENTS A 1 STC Consistent with N8110 69 or Order 8110 4 Aviation Authority approved installers are hereby granted permission to use STC SA00870WI data to modify aircraft ...

Page 44: ...Page A 2 GTX 327 Installation Manual Revision K 190 00187 02 ...

Page 45: ...tems do not apply in which case they should be marked N A Not Applicable INSTRUCTIONS FOR CONTINUED AIRWORTHINESS GARMIN GTX 327 1 Introduction Aircraft that has been altered Registration N number Make Model and Serial Number Content Scope Purpose and Arrangement This document identifies the Instructions for Continued Airworthiness for the modification of the above aircraft by installation of a Ga...

Page 46: ... 13 2A Also refer to Section 2 of this manual 12 Special Tools N A 13 This Section is for Commuter Category Aircraft Only A Electrical loads Refer to Section 1 5 of this manual B Methods of balancing flight controls N A C Identification of primary and secondary structures N A D Special repair methods applicable to the airplane Antenna installation removal and replacement should be in accordance wi...

Page 47: ... 409 inspection program for their aircraft This is accomplished when a maintenance entry is made in the aircraft s maintenance record in accordance with Section 43 9 This entry records the major alteration and identifies the original ICA location e g Block 8 of FAA Form 337 dated ______ along with a statement that the ICA is now part of the aircraft s inspection maintenance requirements A 3 Enviro...

Page 48: ...Page A 6 GTX 327 Installation Manual Revision K 190 00187 02 Figure A 1 GTX 327 Environmental Qualification Form Sheet 1 of 2 ...

Page 49: ...GTX 327 Installation Manual Page A 7 190 00187 02 Revision K Figure A 1 GTX 327 Environmental Qualification Form Sheet 2 of 2 ...

Page 50: ...Page A 8 GTX 327 Installation Manual Revision K 190 00187 02 This page intentionally left blank ...

Page 51: ...APPENDIX B ASSEMBLY AND INSTALLATION DRAWINGS GTX 327 Installation Manual Page B 1 Page B 2 blank 190 00187 02 Revision K Figure B 1 GTX 327 Outline Drawing ...

Page 52: ... 16 1 4 330 00220 25 BACKSHELL D SUB METAL 25 1 5 330 00184 25 CONN D SUB MIL CRP SCKT 25 1 6 336 00022 00 CONT SCKT MIL CRP SIZE 20 25 336 00023 00 CONT SCKT MIL CRP SIZE 20 18 5 312 00005 05 TUBING HT SHRINK 2 3IN 7 115 00431 00 INSTALL RACK 1 8 125 00032 04 BACK PLATE 1 9 211 60234 06 SCREW 4 40X 187 PHP SS P 4 10 125 00046 00 NUT PLATE D SUB 25 POS 2 11 234 10002 00 SPRING W ASHER 1 12 330 003...

Page 53: ...APPENDIX B ASSEMBLY AND INSTALLATION DRAWINGS GTX 327 Installation Manual Page B 5 Page B 6 blank 190 00187 02 Revision K Figure B 3 GTX 327 Recommended Panel Cutout Dimensions ...

Page 54: ...APPENDIX C INTERCONNECT DRAWINGS GTX 327 Installation Manual Page C 1 Page C 2 blank 190 00187 02 Revision K Figure C 1 GTX 327 to 400 500 Series Units Typical Interconnect Wiring Diagram ...

Page 55: ...APPENDIX C INTERCONNECT DRAWINGS GTX 327 Installation Manual Page C 3 Page C 4 blank 190 00187 02 Revision K Figure C 2 GTX 327 to GNS 480 CNX80 Typical Interconnect Wiring Diagram ...

Page 56: ...APPENDIX C INTERCONNECT DRAWINGS GTX 327 Installation Manual Page C 5 Page C 6 blank 190 00187 02 Revision K Figure C 3 Dual TXP Interconnect Wiring Diagram Encoding Altitude Connections Sheet 1 of 2 ...

Page 57: ...APPENDIX C INTERCONNECT DRAWINGS GTX 327 Installation Manual Page C 7 Page C 8 blank 190 00187 02 Revision K Figure C 3 Dual TXP Interconnect Wiring Diagram Encoding Altitude Connections Sheet 2 ...

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