Page 1 SN3500 Primary Navigation Display Installation Manual Sandel Avionics, Inc. 2401 Dogwood Way Vista, CA 92081 Phone (760) 727- 4900 FAX 760) 727- 4899 Website: www.sandel.com Email: support@sandel.com 82005-IM-K...
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Page 3: Table Of Contents
Disclaimer ..............................1-10 Technical Information ....................2-1 General ................................2-1 Part Numbers ...............................2-1 2.2.1 Installation Kit and Accessories ......................2-2 2.2.2 Bill of Materials – SN3500 Install Kit .....................2-2 Approval Summary .............................2-2 2.3.1 License Requirements...........................2-2 2.3.2 Approval Data ............................2-2 2.3.3 Technical Standard Order Stipulation....................2-3 2.3.4...
Page 4 Page 10: OBS / RELAY / CDI......................7-20 7.1.11 Page 11: WX-500 ..........................7-22 7.1.12 Page 12: Traffic..........................7-23 7.1.13 Page 13: STATUS ..........................7-24 7.1.14 Page 14: BRT/DATA BLK ......................... 7-25 7.1.15 Page 15: Power ..........................7-27 82005-IM-K Sandel SN3500 Installation Manual Page iv...
Page 5 Enroute Operations........................... 11-16 11.5.3 GPS Approach Operations....................... 11-17 11.5.4 TACAN Approach Operations......................11-17 11.5.5 ILS Approach Operations......................... 11-17 11.5.6 Additional Testing ..........................11-18 12 Appendix F: List of Effective Drawings and Attachments ........12-1 82005-IM-K Sandel SN3500 Installation Manual Page v...
Page 6 Section 3.3.1 change inverter range from 360 - 440Hz. to 240 - 560 Hz. 8/24/09 Section 3.3.2 change inverter range from 360 - 440Hz. to 240 - 560 Hz. Section 7.1.1 corrected reference from ST3400 to SN3500. Updated for software version 4.00 AR1055. Page vi: Updated revision history.
Page 7 Clarify composite input connection with analog NAVs. Page 3-9: Clarify P2-10 HDG/CRS Excitation connection when not connected. Page 5-1: Added reference to 82005-PG (SN3500 Pilot’s Guide) for light source identification and data color coding details. Page 7-1: Updated INDEX maintenance page image.
Page 8 Revision Date Comments 04/21/2005 A/R 780 minor doc and dwg changes 03/31/2005 Initial release 82005-IM-K Sandel SN3500 Installation Manual Page viii...
Page 9: General Information
The SN3500 is the industry’s most capable electronic HSI. It can be used to directly replace a mechanical DG or HSI as a primary display, or the SN3500 can be used as a replacement or upgrade for an existing Sandel SN3308 navigation display. It is signal (but not plug) compatible with the SN3308, and is an upgrade in performance with both an improved display and added features.
Page 10: Installation Planning
VHF navigation receivers, ADF’s, TACAN’s, DME’s, GPS’s, remote gyros and flux gates. The SN3500 is designed to display the flight plan data from a connected GPS receiver. The moving map database for the SN3500 as well as the internal operating system software are field loadable through the use of a portable computer equipped with a USB port and a USB capable version of Microsoft Windows.
Page 11: Post Installation Summary
1.4 Interface Planning 1.4.1 Compass System Determine whether the SN3500 is to be used internally slaved or unslaved. Unslaved operation would be appropriate when the SN3500 is bootstrapped to an already slaved compass system or is being slaved to a panel mounted DG with bootstrap output.
Page 12: Autopilot Switching
DG’s with XYZ bootstrap outputs require the master 400Hz inverter to be connected to the SN3500 400Hz reference input on P1-16. This input is used to lock all 400Hz inputs on P1 and 400Hz outputs in the SN3500. This input presents no loading to the source.
Page 13: Autopilot Course And Heading Datum
A pole on the external relay is used to ground an SN3500 input pin when the relay is in the energized position. If the low signal is not detected, the SN3500 annunciates the relay failure by redlining the NAV source display.
Page 14: Marker Beacon
This feature can be disabled on the NAV maintenance page. In the Master mode this will cause the SN3500 to revert to and annunciate NAV1 when an ILS is tuned on NAV1, or NAV2 when an ILS is tuned on NAV2. Disabling of ILS lockout is...
Page 15: Arinc Channels
0/180 phase is made by the appropriate maintenance page calibration. 1.4.9 ARINC Channels The SN3500 contains universal inputs capable of communicating with ARINC 429, ARINC 419, RS232 and Analog. All equipment capable of ARINC compatibility (such as GPS/FMS, Navigation, Traffic, etc) can be directly connected to the appropriate signal input.
Page 16: Special Considerations For Ups Gxxx
Some remote traffic processors may require remote switches, see the Traffic interface drawings in this manual for these requirements. When interfaced to a TCAS II remote processor, the SN3500 can only be used as a secondary display as it will not display vertical guidance for the purpose of resolution advisories.
Page 17: Tacan
See the WSI Data Link Receiver interface drawings in this manual for interface wiring requirements. The SN3500 can be configured to operate as the sole weather display or a listener when another display is installed and configured to command the WSI receiver.
Page 18: Night Vision Support Option
Sandel Avionics does not assume any risk for nor accept any responsibility for the interface descriptions contained within this Installation Manual. It is the responsibility of the installer to ensure that such equipment is compatible with the SN3500 as described, and to ensure that the installation of the SN3500 is accomplished with such equipment using the specific equipment manufacturer’s installation and...
Page 19: Technical Information
ATI clamp. A black or grey bezel is provided. The SN3500 operates on an input voltage from 22 to 33 Volts DC (11 to 33 volts DC on units with serial number 5-2500 or higher), nominal 35 watts. One or two 26 Volts...
Page 20: Installation Kit And Accessories
Bezel Adapter Kit KI-525 Flush (Used to fill non-standard sized hole in installations replacing a KI-525 indicator.) 90130-LK Lamp Kit (Replacement lamp for lamp units) 2.2.2 Bill of Materials – SN3500 Install Kit Description 32062 Conn., D- 15 with pins (Positronics P/N SD15F10JVLO) 32063 Conn., D-44 with pins (Positronics P/N DD44F10JVLO)
Page 21: Technical Standard Order Stipulation
A sample Form 337 is included in the Appendix. The basis of approval is for use as a primary navigation display for the functions of basic directional and navigational information. Moving map operations of the SN3500 is to be approved as supplemental means for VFR or IFR navigation, consistent with the approval of the long-range navigation system.
Page 22 The Environmental Qualification Form for the SN3500 is included in the Appendix, and should be referenced to the categories appropriate to the aircraft type and environment into which the SN3500 is to be installed. The environmental category for the SN3500 should be stipulated on the FAA Form 337, or other approval form.
Page 23: Physical, And Electrical Properties
AC and DC sine, cosine, and discrete input and output voltages. The SN3500 design and operation is optimized for efficient adaptability to both new and existing avionics equipment and systems.
Page 24: Connector P1
ADF Discrete, Note: Not used when 429 is data source A429 A side 429 WX500 1A (RS422) + side 422 (RS232) Ground side A429 B side 429 WX500 1B (RS422) - side 422 (RS232) 82005-IM-K Sandel SN3500 Installation Manual Page 2-6...
Page 25 (In) External (A429) A side 429 Brightness (R422) + side 422 Control (R232) Ground side (A407) Synchro X (In) (A429) B side 429 Spare 1 (R422) - side 422 (R232) (A407) Synchro Y 82005-IM-K Sandel SN3500 Installation Manual Page 2-7...
Page 26 (future provision not currently supported) OBS/LEG Discrete Note 1: 3 volt composite inputs require the use of a series resistor. See installation drawings. Note 2: For XYZ inputs Z is signal ground P1-1. Outside View (Mating Connector) 82005-IM-K Sandel SN3500 Installation Manual Page 2-8...
Page 27: Connector P2
ADF Discrete, Note: Not used when 429 is data source A429 A side 429 (RS422) + side 422 NAV2A (RS232) Ground side A710 Composite Video Note: For composite inputs see P2-42 A429 B side 429 NAV2B (RS422) - side 422 (RS232) 82005-IM-K Sandel SN3500 Installation Manual Page 2-9...
Page 28 Hdg Crs/Datum inverter connected to P1-16 or is not 400Hz Excitation Locked to P1-16 or P2-10 Course Datum Locked to P1-16 or P2-10 Hdg Datum Bootstrap, locked to inverter on P1 Hdg X Out 82005-IM-K Sandel SN3500 Installation Manual Page 2-10...
Page 29 RS232-2 Out Spare 429-2A A429 A side 429 429-2B A429 B side 429 Note 1: For XYZ inputs Z is signal ground P1-1. For XYZ Outputs Z is power ground. Outside View (Mating Connector) 82005-IM-K Sandel SN3500 Installation Manual Page 2-11...
Page 30: Connector P3
In – Active Low Discrete REV Control Analog DME Valid Discrete Valid REV Control FCS BACK COURSE (Open Drain) GPS1 Relay Open Drain GPS2 Relay Open Drain NAV2 Relay Open Drain Outside View (Mating Connector) 82005-IM-K Sandel SN3500 Installation Manual Page 2-12...
Page 31: Signal Characteristics Table
Z (Ω – Power Off) Note 3 A429 +/- 5Vdc 70mAdc 2K (Minimum) RS232 +/- 5Vdc 70mAdc 500 (Minimum) A575 3.54 mA +/-1% 25mA Open Drain 250mAdc >350K 1 or High Impedance (over current protected) 82005-IM-K Sandel SN3500 Installation Manual Page 2-13...
Page 32 1.0v from its nominal threshold shown in the table either in the active or inactive state. Value is for maximum non-sustained input voltage, maximum sustained voltage is 10.8vdc. 82005-IM-K Sandel SN3500 Installation Manual Page 2-14...
Page 33: Arinc 429
SN3500 and peripheral avionics equipment. The bus conforms to 419/429 specifications for electrical characteristics, receiving, and transmission interval. The SN3500 is capable of receiving the following ARINC 419/429 long-range NAV, ADF, TCAS, or DME inputs for processing and display as follows:...
Page 34 Status Word (GAMA) Message Checksum Station Type, Class Message Characters 1-3 Message Characters 4-6 Waypoint Latitude Waypoint Longitude L/R Procedure Turn Azimuth L/R Holding Pattern Azimuth Arc Inbound Course Arc Radius Arc Change Angle 82005-IM-K Sandel SN3500 Installation Manual Page 2-16...
Page 35: Arinc 419/429 Serial Transmitter Interfaces
Technical Information 2.6.2 ARINC 419/429 Serial Transmitter Interfaces The SN3500 is capable of transmitting the following low or high speed ARINC 429 data: LABEL DESCRIPTION Selected Course 100G (Using extended SDI) Magnetic Heading 82005-IM-K Sandel SN3500 Installation Manual Page 2-17...
Page 36: Installation
3.2 Installation Considerations 3.2.1 General Considerations The SN3500 should be installed in accordance with standards established by the customer’s installing agency, and existing conditions as to unit location and type of installation. However, the following considerations should be heeded before installing the SN3500.
Page 37: Electrical Installation Considerations
3.2.4 Electrical Installation Considerations Connections and functions of the SN3500 are described in this section. Refer to the SN3500 Interconnect Wiring Diagrams for detailed wiring information and appropriate notes. Refer to the Functional Pinout Descriptions for explanations of pin functions.
Page 38 Flux Gate (if installed), Gyro Reference, and Gyro XYZ (if installed). I. Power Wiring. To assure that the SN3500 will operate properly down to its rated minimum input voltage of 22Vdc, ensure that two power wires of at least the recommended size are connected from the SN3500 circuit breaker to the SN3500 in accordance with the installation drawings.
Page 39: Signal Details
Selection of the logic level of this pin is in the Compass maintenance page. P1-4: ADF-1 AC-X or DC-SIN Input / TACAN 2 429/419 A P1-34: ADF-1 AC-Y or DC-COS Input / TACAN 2 429419 B 82005-IM-K Sandel SN3500 Installation Manual Page 3-4...
Page 40 Differential input supports VHF NAV or long-range navigation +TO pointer and +FROM pointer outputs. In-view is greater than 40 m (to) and –40m (from). 24 AWG twisted shielded pair wire is recommended functions. 82005-IM-K Sandel SN3500 Installation Manual Page 3-5...
Page 41 P1-15: OBS-/LEG, HLD-/AUTO or PAR TRK- Annunciator Input For selected GPS-1 receiver with OBS/LEG mode (or HOLD/AUTO), this input when low senses and annunciates OBS or HOLD on the SN3500 display and changes the mode of the course pointer from auto-slew to manual control.
Page 42: Connector P-2 Pinout Descriptions
. These NAV1 signals also control the ILS Lockout logic so the SN3500 can sense when a GPS receiver is inappropriately selected as the primary NAV source when ILS Lockout is not disabled on the NAV maintenance page. Connections to these pins are from the respective VHF navigation receiver and optionally by the GPS receiver.
Page 43 The resolver is electrically zeroed at zero degrees plus the calibration value in the NAV maintenance page. For normal use this calibration value will be –60 degrees (equaling 300 degrees electrical zero). This is the factory 82005-IM-K Sandel SN3500 Installation Manual Page 3-8...
Page 44 A different calibration value setting is used for each possible NAV source selectable on the SN3500. 24 AWG twisted shielded pair conductor is recommended for these functions. Please see the warnings on the installation drawings concerning DC REF, which must not be inadvertently grounded..
Page 45: Connector P-3 Pinout Descriptions
Open Drain active-low output used to operate the OBS function of Bendix/King KLN-90 GPS receivers or the HOLD function of the II Morrow and Garmin GPS receivers. Accessible during normal use from the pilots GPS MODE soft key. 82005-IM-K Sandel SN3500 Installation Manual Page 3-10...
Page 46 NAV maintenance pages. P3-4: GPS1 Relay Sense / GPS SELECTED Input This input is used when the SN3500 is set up for slave mode so an external GPS switch can be used to switch to an external GPS receiver. Causes proper mode switching and annunciation on the SN3500 display.
Page 47 Open Drain. Used to feed the back course sensing input of an AFCS. When the Course Select rotates either direction passing 90º clockwise or counterclockwise from the lubber line of the SN3500 will generate an open- drain closure. An external relay may be required to make this signal active- high.
Page 48: Setup Procedures
4.2 Accessing the Maintenance Menus To access the Maintenance Menus perform the following operations: A. Prior to applying power to the SN3500, depress and hold the [BRG] and the [MEM] pushbuttons, then apply power to the unit. Continue to hold until the first maintenance menu appears.
Page 49: Operating Details
SN3500, Sandel Avionics P/N 82005-PG, and to the Airplane Flight Manual Supplement. The SN3500 may utilize either an LED light source or a lamp light source. The pilots guide (P/N 82005-PG, revision F or later) should be referenced for light source identification and applicable data color coding information.
Page 50: Instructions For Continued Airworthiness
FAA Advisory Circulars 23.1309-1( ) and 25.1309-1( ) which identifies potential failure modes of the Sandel Avionics Model SN3500 Navigation Display. The assumption made is that all functions of the SN3500 will be used in an essential (primary) navigation function.
Page 51: Appendix A: Post-Installation Procedures
Appendix A: Post-Installation Procedures Appendix A: Post-Installation Procedures After all wiring has been verified and the SN3500 has been installed into the panel, the maintenance pages must be accessed to properly configure the SN3500 for the installed equipment. Prior to applying power to the SN3500, depress and hold the [BRG] and the [MEM] keys, and then apply power to the unit.
Page 52: Index
Maintenance Index page. The [PREV] or [NEXT] Soft keys may also be used to reach a particular maintenance page sequentially. The [MODE] Soft key is used to toggle the SN3500 between READ and EDIT mode. Note: The SN3500 must be in EDIT mode to make configuration changes on the following maintenance pages.
Page 53: System
The System page provides information that identifies the unit and the unit’s hardware and software. Configuration Field Options Comment Rmt Switch Annun Set to yes to allow SN3500 to control switch inputs (LEG/OBS switching, APPR ARM etc.) through Pilot’s Menu.
Page 54: Compass System
The Compass System page configures the gyro and fluxgate (if applicable) to the SN3500. Configuration Field Options Comment HEADING NONE Selects the gyro input to the SN3500. 429H XYZ- MID CONT KG102 VALID NONE Not shown if 429 or 429H is selected for HIGH heading.
Page 55 After the four cardinal points have been adjusted and verified, a final check of the systems should be done by power cycling the SN3500 into normal mode and ensuring the compass rose is correct for each cardinal heading.
Page 56 Enter the Reversionary attitude key. ATT Pin None Active L (P3-6) Connector pin values do not appear in Active L (P3-13) the ATT Pin selection field. The appear above in the PINS field. 82005-IM-K Sandel SN3500 Installation Manual Page 7-6...
Page 57: Adf/Tacan/ Mkr
Selects type of ADF signal input. bearing indication is off by 180, change 429H selection to opposite polarity. XYZ- S/C DC S/C DC- VALID NONE Not shown if 429 or 429H is selected for ADF source HIGH 82005-IM-K Sandel SN3500 Installation Manual Page 7-7...
Page 58 Selects type of input from the marker ACTIVE L beacon receiver. ACTIVE H 429H THOLD Default 003 Used to adjust the signal voltage threshold when ACTIVE L or ACTIVE H is selected for the marker beacon input. 82005-IM-K Sandel SN3500 Installation Manual Page 7-8...
Page 59: Nav/Ils/Dme 1
Only used when COMP is selected for the NAV signal input. A VOR test set should be used to accurately calibrate the displayed bearing pointer reading. ENRGZ NONE Selects ILS Energize input. 429H ACTIVE H ACTIVE L 82005-IM-K Sandel SN3500 Installation Manual Page 7-9...
Page 60 90 degrees out, change the OBS ROT setting on Maintenance Page 10 to REVERSED and return to step a. d) Check the to/from flag on the SN3500 display. If to/from is reversed (and correct wiring has been verified) adjust the OBS CAL 180 degrees from the current setting.
Page 61 RF signal level (25uV or greater). 1. On the SN3500 NAV maintenance page, select LOC DV and change to COMP to select Composite Localizer.
Page 62: Nav/Ils/Dme 2
Only used when COMP is selected for the NAV signal input. A VOR test set should be used to accurately calibrate the displayed bearing pointer reading. ENRGZ NONE Selects ILS Energize input. 429H ACTIVE H ACTIVE L 82005-IM-K Sandel SN3500 Installation Manual Page 7-12...
Page 63 Appendix A: Post-Installation Procedures LOC DV NONE Selects localizer signal input. The SN3500 has a built-in NAV converter to 429H decode localizer validity and deviation ANALOG from a composite signal input. COMP If COMP is selected see “Composite LOC Calibration procedure” in the previous section.
Page 64: Gps1
May require adjustment if the GPS receiver uses an RS-232 interface and has a resolver connected. ARINC - 429 Not shown when selected GPS does 429H not have ARINC 429 output. 82005-IM-K Sandel SN3500 Installation Manual Page 7-14...
Page 65 NONE GPS approach active source select. ANNUN IN ACTIVE L ACTIVE H Select from list Select the appropriate model of GPS from the list. Press the SET soft key (CLR button) to program. 82005-IM-K Sandel SN3500 Installation Manual Page 7-15...
Page 66: Gps2
May require adjustment if the GPS receiver uses an RS-232 interface and has a resolver connected. ARINC – 429 Not shown when selected GPS does 429H not have ARINC 429 output. 82005-IM-K Sandel SN3500 Installation Manual Page 7-16...
Page 67 NONE GPS approach active source select. ANNUN IN ACTIVE L ACTIVE H Select from list Select the appropriate model of GPS from the list. Press the SET soft key (CLR button) to program. 82005-IM-K Sandel SN3500 Installation Manual Page 7-17...
Page 68: Fcs Emulation
Automatically configured when FCS is +LEFT selected from list below. SCL V/D Default settings reset when FCS is selected from list below. MIN V Default settings reset when FCS is selected from list below. 82005-IM-K Sandel SN3500 Installation Manual Page 7-18...
Page 69 The other settings on this page are not for installer adjustment except on advice of the factory, service bulletin, or service information letter. Note that the adjustments are shown in the left column of values. The right column shows the default values for reference purposes. 82005-IM-K Sandel SN3500 Installation Manual Page 7-19...
Page 70: Obs / Relay / Cdi
NORMAL output. REVERSE MODE MASTER Selects NAV/GPS switching mode. SLAVE In MASTER mode, the SN3500’s NAV button is used to switch between NAV and GPS sources. In SLAVE mode a remote switch is used. SENSE NONE Enables relay sense input to verify GPS1 relay switching.
Page 71 Adjusts zero offset of the vertical deviation output. *  * This adjustment may be used to fine tune the autopilot localizer or glide slope tracking if the SN3500 lat and vertical deviation outputs have been connected to the autopilot. 82005-IM-K Sandel SN3500 Installation Manual...
Page 72: Wx-500
Normally not used as the antenna UNKNOWN location is set by jumpers on the WX- 500. INFO RQ FAULT LIST Requests information from WX-500. CONFIGURATION Information will be shown at the bottom ENVIRONMENT of the display. S/W VERSION 82005-IM-K Sandel SN3500 Installation Manual Page 7-22...
Page 73: Traffic
Configuration Field Options Comment DATA LINK WSI w / TX SN3500 is sole display. (Software version SN3500 is wired as receive only, 3.00 and above) WSI no TX another display is connected to the WSI receiver. DLINK KEY Blank by default...
Page 74: Status
Appendix A: Post-Installation Procedures 7.1.13 Page 13: STATUS Sensor summary status. 82005-IM-K Sandel SN3500 Installation Manual Page 7-24...
Page 75: Brt/Data Blk
INTERNAL. Not applicable to non-NVIS units. DATA RECORD BLK None For factory use. Calibrating the external brightness control minimum brightness: BEFORE performing calibration: Select the “BRT” maintenance page, select EXTERNAL for brightness control. 82005-IM-K Sandel SN3500 Installation Manual Page 7-25...
Page 76 Repeat steps 1,2,3,4 with external NVIS selected NOTE: From this point on the pilot will be able to trim the minimum brightness, if desired, using the ‘M’ button to enter the pilot’s menu. 82005-IM-K Sandel SN3500 Installation Manual Page 7-26...
Page 77: Power
Appendix A: Post-Installation Procedures 7.1.15 Page 15: Power Monitors power inputs to the SN3500 including the #1 and #2 inverters. 82005-IM-K Sandel SN3500 Installation Manual Page 7-27...
Page 78: Software Crc
Appendix A: Post-Installation Procedures 7.1.16 Page 16: Software CRC Displays CRC values for the software and database programs. Press the [UPDATE] soft key to re-calculate. Contact Sandel if FAIL is annunciated for any of the values. 82005-IM-K Sandel SN3500 Installation Manual Page 7-28...
Page 79: Appendix B: Environmental Qualification Form
MANUFAC T URER’S SPEC IFIC AT IO N AND/ O R O T HER APPL IC ABL E SPEC IFIC AT IO N: a .) De sig n Re q uire me nts & O b je c tive s Fo r SN3500 EHSI, d o c ume nt numb e r 82006-0010 b .) RT C A D0-160D Enviro nme nta l Pla n Fo r Sa nd e l SN3500 EHSId o c ume nt numb e r 82006-0090...
Page 80 Appendix B: Environmental Qualification Form RTCA/DO-160E Environmental Qualification Form (LED Models) 82005-IM-K Sandel SN3500 Installation Manual Page 8-2...
Page 81: Appendix C: Sample Faa Form 337
AlliedSignal Electronics and Avionics, KMT 112 Magnetic Azimuth Transmitter. (or as appropriate) (By example state the following functional interface properties)... C. The SN3500 receives and processes GPS navigation information for digital and waypoint display from the GPS165. These operations are considered supplemental navigation.
Page 82 Appendix C: Sample FAA Form 337 D. The SN3500 receives and processes VOR, localizer, and glideslope deviation and composite audio for bearing display from the KX 165. These operations are considered primary means of navigation. E. The SN3500 receives and processes glideslope deviation and composite audio for bearing display from the KX 155.
Page 83: Appendix D: Sample Airplane Flight Manual Supplement
Add following text if Data Link Weather is installed: The FIS-B weather display shall not be used for tactical maneuvering of the aircraft. SECTION III EMERGENCY PROCEDURES If the SN3500 fails to operate, use the magnetic compass as a heading source. 82005-IM-K Sandel SN3500 Installation Manual Page 10-1...
Page 84 NAV1 or NAV2. This will be annunciated on the SN3500 Navigation Display. The SN3500 BRG pushbutton selects the bearing pointer 1 / 2 / both. The ‘M’ pushbutton followed by the BRG pushbutton selects the bearing pointer sources NAV1, NAV2, GPS1, GPS2, or ADF.
Page 85  The FIS-B weather display is not exactly real time. Under certain circumstances the time from when the NEXRAD radar observations were made to when the data is displayed on the SN3500 can be as high as 40 minutes. During this time the position of the weather may have significantly changed or moved relative to the aircraft position.
Page 86 Appendix D: Sample Airplane Flight Manual Supplement The circuit breaker for the SN3500 Navigation Display is located on the lower right circuit breaker panel labeled EHSI 1. Refer to the SN3500 Primary Navigation Display Pilot’s Guide for other procedures, error messages, alerts and more detailed FIS-B data link weather information.
Page 87: Appendix E: Checkout Procedures
11.1 Functional Ground Test Procedures/Report The “Functional Ground Test Procedures/Report” below is for the purpose of simplifying ground tests of the SN3500. A copy of this report (and the “Operational Flight Check Procedures/ Report”) must be retained by the installing agency and a copy must be installed in the aircraft maintenance records.
Page 88 Appendix E: Checkout Procedures COMPANY NAME COMPANY ADDRESS TELEPHONE/FAX Ground Test Procedures/Report Sandel Avionics SN3500 Installed in {aircraft make and model} Registration No. ________ SN3500 Serial No. ______________ Document No. ____________ Rev. - , Date 82005-IM-K Sandel SN3500 Installation Manual Page 11-2...
Page 89: Introduction
“Post-Installation Procedures”, but prior to performing flight test procedures. Successful completion of both the Ground Test and Flight Test procedures is necessary to support the claim that the SN3500, as installed, performs its intended function and is compatible with all aircraft systems.
Page 90: System Configuration
Power check all wiring to ensure that 28 Vdc and 26 Vac (if applicable) are applied to the proper pins and nowhere else. Completed _______ Comment __________________________________ Install the SN3500 into the clamp tray and verify full connector mating and that the unit installs without obstruction. Completed _______ Comment __________________________________ Activate the aircraft master switch and avionics master switch, if installed.
Page 91: Nav Source Selection
GPS1, GPS 2, TACAN 1, TACAN 2 (or as configured). For each NAV source, create valid and invalid NAV conditions and verify correct display of the SN3500 NAV flag for each receiver (the large red “X” through the CDI). For each VOR/LOC source, verify that tuning an ILS frequency causes the glideslope (vertical deviation) scale to display on the screen, even if it is flagged.
Page 92: Loc/Gs Deviation
11.1.10 BRG Source Selection Press M and then press BRG on the SN3500 and verify that all installed NAV sources are presented for each bearing pointer (NAV1, NAV2, ADF1, ADF2, TACAN 1, TACAN 2, GPS1, GPS2 as installed). In addition, bearing pointer 1 will have “AUTO”...
Page 93: Gps Interface And Control
If an external DME HOLD control is configured: Verify that enabling DME HOLD displays the “H” symbol for each installed DME receiver so equipped Completed _______ Comment __________________________________ 11.1.12 GPS Interface and Control For each GPS receiver installed and configured: 82005-IM-K Sandel SN3500 Installation Manual Page 11-7...
Page 94: Marker Beacon Interface
Appendix E: Checkout Procedures Allow the receiver to acquire a valid position fix, and press NAV on the SN3500 to select that receiver as a NAV source. Enter either a single destination waypoint or a flight plan on the GPS receiver and select normal (LEG) navigation mode.
Page 95: Flight Control System Interface
SN3500 display. Completed _______ Comment __________________________________ Press M and then WX and select “WX TEST”. Verify that the word “TEST” is annunciated on the SN3500 display for approximately 10 seconds, and is then replaced by “WX”. Completed _______ Comment __________________________________ 11.1.16...
Page 96: Nvis Control
Activate the external ‘REV’ control switch and verify the SN3500 displays a representative horizon and compass arc for the attitude of the aircraft. Place the ‘REV’ control switch back in the normal position and verify the SN3500 switches back to the normal HSI display.
Page 97: General Testing
Attempt to discern any interference caused by the SN3500. Pull the SN3500 breaker if interference is noted, to verify that the SN3500 is the source. Completed _______ Comment __________________________________ Repeat for the secondary communications radio.
Page 98: Additional Testing
Appendix E: Checkout Procedures 11.2.3 Additional Testing Perform any additional EMI/RFI-related tests deemed necessary. Completed _______ Comment __________________________________ 82005-IM-K Sandel SN3500 Installation Manual Page 11-12...
Page 99: Operational Flight Test Procedures/Report
11.3 Operational Flight Test Procedures/Report The following “Operational Flight Check Procedures/Report” is for the purpose of simplifying the in-flight operational check of the SN3500. A copy of this report (and the “Functional Ground Test Procedures/ Report”) must be retained by the installing agency and a copy must be installed in the aircraft maintenance records.
Page 100 Appendix E: Checkout Procedures COMPANY NAME COMPANY ADDRESS TELEPHONE/FAX Flight Test Procedures/Report Sandel Avionics SN3500 Installed in {aircraft make and model} Registration No. ________ Serial No. ______________ Document No. ____________ Rev. - , Date 82005-IM-K Sandel SN3500 Installation Manual Page 11-14...
Page 101: Introduction
Apply power to the SN3500 and all associated equipment. Determine that all equipment initializes and functions normally. Verify that the SN3500 internal brightness control can control the brightness of the SN3500 and that a satisfactory brightness level can be attained.
Page 102: Enroute Operations
Verify proper operation of one or both TACAN receivers (as installed), both as NAV sources and as bearing pointer sources. Completed _______ Comment __________________________________ Verify proper operation of one or both ADF sources as bearing pointers if installed. Completed _______ Comment __________________________________ 82005-IM-K Sandel SN3500 Installation Manual Page 11-16...
Page 103: Gps Approach Operations
 Resolver interface in OBS or HOLD mode  GPS annunciator display on the SN3500 (as installed)  External GPS mode control switches on the SN3500 (as installed)  Waypoint display when map is enabled on the SN3500 Completed _______ Comment __________________________________ 11.5.4...
Page 104: Additional Testing
Appendix E: Checkout Procedures  Marker beacon annunciation on the SN3500, if installed  Flight control system operation. Completed _______ Comment __________________________________ 11.5.6 Additional Testing Perform any additional flight testing deemed necessary. Completed _______ Comment __________________________________ 82005-IM-K Sandel SN3500 Installation Manual...
Page 105: Appendix F: List Of Effective Drawings And Attachments
CENTURY IV AUTOPILOTS 82005-10 pp 8 CENTURY 1C388 COUPLERS 82005-10 pp 9 S-TEC AUTOPILOTS 82005-10 pp 10 KING KG102A – SN3500 SLAVING 82005-10 pp 11 KCS55 – BOOTSTRAP XYZ 82005-10 pp 12 S-TEC (AERONETICS) GYRO 82005-10 pp 13 XYZ GYRO (GYRO SELF SLAVED)
Page 106 TCAS II 82005-10 pp 36 SINGLE SN3500 GNS480 82005-10 pp 37 WSI Data Link Receiver 82005-10 pp 38 SN3500 with SG102 ARINC 429 or 407 Interface 82005-10 pp 39 SN3500 with TACAN 82005-10 pp 40 NVIS Control 82005-10 pp 41...
Page 107 CAD GENERATED DRAWING, DIMENSIONS ARE IN INCHES DO NOT MANUALLY UPDATE TOLERANCES ARE: VISTA, CA APPROVALS DATE FRACTIONS DECIMALS ANGLES DRAWN MCLANE 03/09/05 LAYOUT, SN3500 .XXX .005 CHECKED MATERIAL RESP ENG SN3500 3.285 FINISH MFG ENG NEXT ASSY USED ON DWG. NO.
Page 110 3. INVERTER 2 ONLY REQUIRED IF XYZ ADF IS USED CONNECTED TO P2. 4. INSTALLATIONS IN 14 VOLT AIRCRAFT REQUIRE SN3500 SERIAL NUMBER 5-2500 OR HIGHER. SN3500 SERIAL NUMBERS LOWER THAN 5-2500 AND INSTALLED IN 14 VOLT AIRCRAFT REQUIRE A 14V TO 28V CONVERTER.
Page 111 SEE NOTE 4, 5 INVERTER EXC SIGNAL GROUND NOTES: 1. IN THIS CONFIGURATION THE SN3500 ACTS AS THE AUTOPILOT SWITCHING RELAY AND OUTPUTS TO THE AUTOPILOT WHATEVER NAV SOURCE IS SELECTED. 2. THIS IS A GENERIC ILLUSTRATION. REFER TO THE SPECIFIC DETAIL DRAWINGS FOR YOUR INSTALLATION.
Page 112 OBS RESOLVER COS OUT OBS COS GPS DISPLAYED NOTES: IN THIS CONFIGURATION THE SN3500 ACTS AS AN INDICATOR, FOLLOWING THE RECEIVER SELECTED WITH AN EXTERNAL RELEAY. THIS IS A GENERIC ILLUSTRATION. REFER TO THE SPECIFIC DETAIL DRAWINGS FOR YOUR INSTALLATION.
Page 113 ACFT PWR NOTES: 1. IF INSTALLATION ALREADY CONTAINS A KING KA52/57 AUTOPILOT 1N4004 1N4004 ADAPTER IT MAY REMAIN IN THE SYSTEM. TREAT THE SN3500 AS A KI525. BACK COURSE 14 2. SN3500 DATUM OUTPUTS ARE REFERENCED TO SIGNAL GROUND. Note 4 3.
Page 114 26VAC 400Hz FROM #1 INVERTER or AUTOPILOT EXITATION 400 Hz Vista, Ca. Vista, Ca. Vista, Ca. to 5 KHz. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title BENDIX AUTOPILOTS BENDIX AUTOPILOTS BENDIX AUTOPILOTS...
Page 115 HDG DATUM HI Vista, Ca. Vista, Ca. Vista, Ca. CRS/HDG SIGNAL GND DATUM LO Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING (AS AVAILABLE FROM GYRO) HDG VALID Title Title Title BENDIX/KING AUTOPILOTS BENDIX/KING AUTOPILOTS BENDIX/KING AUTOPILOTS...
Page 116 THE LUBBER LINE DURING HDG-MODE AND NAV-MODE COURSE CHANGES RESPECTIVELY. EXCEPT FOR KI-525 THESE VALUES WILL BE IDENTICAL. Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title CENTURY IV AUTOPILOTS CENTURY IV AUTOPILOTS...
Page 117 10K:10K RESPECTIVELY. NORMALLY THESE VALUES WILL BE THE SAME. (ABOVE COUPLERS DO NOT 3. GROUND CONNECTIONS TO SN3500 SIGNAL GROUND. SUPPORT COURSE DATUM.) 4. DO NOT GROUND ANY CENTURY II/III SIGNALS EVEN DURING TROUBLESHOOTING. THIS COULD DAMAGE THE AUTOPILOT. SEE THE CENTURY INSTALLATION MANUAL FOR DETAILS.
Page 118 1. SELECT KI525 FOR HSI EMULATION ON THE FCS MAINTENANCE PAGE. HDG / CRS SIGNAL GND RETURN Vista, Ca. Vista, Ca. Vista, Ca. GROUND Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title S-TEC AUTOPILOTS S-TEC AUTOPILOTS S-TEC AUTOPILOTS Size Size...
Page 119 Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title KING KG102A - SN3500 SLAVING KING KG102A - SN3500 SLAVING KING KG102A - SN3500 SLAVING Size Size Size Document Number Document Number Document Number 82005-10...
Page 120 EXISTING KCS55 SLAVED COMPASS SYSTEM. THIS MIGHT BE DESIRED WHERE AN EXISTING IS MOVED TO THE COPILOTS SIDE AND AN SN3500 IS INSTALLED ON THE PILOTS SIDE. UNDER THIS CONDITION THE SN3500 CAN BE DRIVEN BY THE BOOTSTRAP OUTPUT OF THE COPILOTS HSI. Vista, Ca.
Page 121 1. THE STEC/AERONETICS GYRO DOES NOT ALLOW THE USE OF AN EXTERNAL 400HZ INVERTER FOR ITS XYZ OUTPUTS. IF AN EXTERNAL INVERTER IS NEEDED TO DRIVE OTHER SYSTEMS WHICH ARE CONNECTED TO THE SN3500, THIS GYRO IS NOT COMPATIBLE. 2. THE 2200 OHM RESISTORS ARE RECOMMENDED (NOT REQUIRED) TO REDUCE RINGING FROM THE INTERNAL INVERTER.
Page 122 NOTES: SELECT NONE FOR FLUXGATE TYPE. Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title XYZ GYRO (GYRO SELF SLAVED) XYZ GYRO (GYRO SELF SLAVED) XYZ GYRO (GYRO SELF SLAVED)
Page 123 DATE REV COMMENTS INITIAL RELEASE COMPUTER CONTROLLED DRAWING DO NOT REVISE MANUALLY TYPICAL XYZ DG AND 26VAC FLUX GATE USING THE SN3500 INTERNAL SLAVING. FLUXGATE SN3500 NOTE 1 FG X FG X FG Y FG Y FG Z FG Z...
Page 124 *May be 2ea 1uF 35v Electrolytic back-to-back Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title XYZ GYRO WITH KMT112 XYZ GYRO WITH KMT112 XYZ GYRO WITH KMT112...
Page 125 4. THIS CONFIGURATION ALLOWS THE USE OF A COLLINS 332-E4 WITHOUT USING THE SLAVING FUNCTION OF THE 328A-3G SLAVING ACCESSORY. SERVO 5. THE 2200 OHM RESISTORS ARE RECOMMENDED (NOT REQUIRED) TO REDUCE RINGING FROM THE INTERNAL INVERTER. THE SN3500 APPLIES NO LOAD TO THE GYRO. SPIN MTR 115V ERECT 26 VAC 6.
Page 126 AVIONICS 14 VDC NOTES: 1. SELECT STEC 6446 FOR FLUXGATE TYPE Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title MID-CONTINENT 4305 MID-CONTINENT 4305 MID-CONTINENT 4305 Size Size...
Page 127 1. SELECT NORMAL OR REVERSE FOR BOOTSTRAP SETTING ON FCS EMULATION PAGE. Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title SN3500 COMPASS BOOTSTRAP SN3500 COMPASS BOOTSTRAP SN3500 COMPASS BOOTSTRAP...
Page 128 APPLIED TO ALL AVIONICS. IF VOLTAGE IS PRESENT, CONNECT SN3500 P1-1 TO FCS GROUND KMT112 FG KA51 AT THE ROLL COMPUTER WITH A NEW WIRE. IF PRIMARY POWER IS APPLIED TO SN3500 P1-1 DAMAGE MAY OCCUR TO THE SN3500 RESULTING IN AN OPEN CIRCUIT AT P1-1. THIS CAN BE P101 CHECKED WITH AN OHM METER.
Page 129 WPT- ANNUN LOCATED AT THE SN3500 CONNECTOR. NOT REQUIRED FOR .5V RS232-TX SOURCE. RELAY SENSE NOTE 8 7. ONLY USED WHEN SN3500 IS IN MASTER MODE. SELECT GPS1 FOR GPS1 SENSE P892 SENSE ON OBS/RELAY/CDI MAINTENANCE PAGE. 10 APPR ARM OUT...
Page 130 WPT- ANNUN LOCATED AT THE SN3500 CONNECTOR. NOT REQUIRED FOR .5V RS232-TX SOURCE. RELAY SENSE NOTE 7 7. ONLY USED WHEN SN3500 IS IN MASTER MODE. SELECT GPS1 FOR GPS1 SENSE P892 SENSE ON OBS/RELAY/CDI MAINTENANCE PAGE. 10 APPR ARM OUT...
Page 131 THE SN3500 CONNECTOR. NOT REQUIRED FOR .5V SOURCE. NOTE 6 APPR ACTIVE 16 LRN APPR IN 8. ONLY USED WHEN SN3500 IS IN MASTER MODE. SELECT GPS1 FOR SENSE ON APPR ARM 44 LRN APPR ARM IN OBS/RELAY/CDI MAINTENANCE PAGE.
Page 132 ARM SELECT APPR ARM OUT SOURCE. LEG/OBS- CTRL OBS CMND OUT 8. ONLY USED WHEN SN3500 IS IN MASTER MODE. SELECT GPS1 FOR SENSE ON OBS/RELAY/CDI MAINTENANCE PAGE. ACFT PWR IN SLAVE MODE THE RELAY DRIVE IS PART OF THE EXTERNAL...
Page 133 RS232-2 RX NOTES: 1. FOR 3V COMPOSITE NAV SOURCES INSERT A 470K SERIES RESISTOR LOCATED AT THE SN3500 CONNECTOR. NOT REQUIRED FOR .5V SOURCE. 2. ILS ENERGIZE AND RELAY SWITCHING OUTPUT ARE ONLY REQUIRED IF NAV-2 IS TO BE USED AS A SECOND PRIMARY VHF NAV RECEIVER. IN THIS...
Page 134 SN3500 P6342 2. FOR ARINC NAV RECEIVER USING 400HZ DIFFERENTIAL RESOLVER: a) THE NAV RCVR AND SN3500 MUST BE ON THE SAME INVERTER. OBS 'E' COS OUT 400HZ DIFF RES. SIN IN b) ON OBS/RELAY/CDI MAINTENANCE PAGE SET OBS TYPE TO "DIFF A".
Page 135 2. USED ON GARMIN AND KING RECEIVERS WHICH REQUIRE LATCHED MODE COMMANDS BUT NOT ON II-MORROW RECEIVERS. 3. SELECT APPROPRIATE RECEIVER ON THE SN3500 GPS MAINTENANCE PAGE. IF INSTALLED RECEIVER IS NOT SHOWN ON THIS MATRIX USE NEAREST COMPATIBLE SETTING OF THE SAME MANUFACTURER AND INSURE THE TEXT AND COLORS OF THE ON-SCREEN ANNUNCIATORS ARE ACCEPTABLE.
Page 136 SPD RX: SPD TX: SDI: VOR/ILS 1 (SDI1) Vista, Ca. Vista, Ca. Vista, Ca. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title SINGLE SN3500 GNS430/530 SINGLE SN3500 GNS430/530 SINGLE SN3500 GNS430/530 Size Size...
Page 137 SEE NOTE 4 ILS/GPS APPROACH NAV2 RELAY SENSE SPECIAL NOTE NAV2 RELAY DISCRETE 1N004 or SN3500 SUPPORTS GPS VNAV VIA ARINC 429 INTERFACE equivalent. Vista, Ca. Vista, Ca. Vista, Ca. The connections and components shown in the dashed TO 28VDC oval are for historical reference.
Page 138 1. SELECT APPROPRIATE SETUP DATA ON ADF INSTALLATION PAGE. SHIELD GND AC INVERTER Vista, Ca. Vista, Ca. Vista, Ca. 26 VAC 400 Hi Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING 26 VAC 400 Lo Title Title Title Size Size Size...
Page 139 1. THESE LOAD RESISTORS ARE REQUIRED FOR PS ENGINEERING MARKER RECEIVERS. RECOMMENDED FOR OTHER RECEIVERS TO PREVENT FAILURE LAMP COM OF THE SN3500 INDICATION IF THE ASSOCIATED MARKER LIGHT BULB FAILS. 2. SET MARKERS TO ACTIVE H OR ACTIVE L ON ADF1/ADF2/MKR MAINTENANCE PAGE Vista, Ca.
Page 140 ENABLE NAV2 DME DISPLAY. DATA DATA 40MV/MILE DME ANALOG + 2. IN A DUAL DME CONFIGURATION THE SN3500 CAN ONLY DETECT DME DME REQ DME REQ HOLD. IT ALWAYS ASSOCIATES DME-1 WITH NAV-1 AND DME-2 WITH SIGNAL COM DME ANALOG - NAV-2.
Page 141 ASSIGNABLE LEAVE THE CORRESPONDING PIN UNCONNECTED. SET DME TO LO FR DME1 ON NAV/ILS/DME 2 MAINTENANCE PAGE TO ENABLE NAV2 DME DISPLAY. 2. IN A DUAL DME CONFIGURATION THE SN3500 CAN ONLY DETECT DME HOLD. IT ALWAYS ASSOCIATES DME-1 WITH NAV-1 AND DME-2 WITH NAV-2.
Page 142 CONFIG GND WX RS-232 GROUND RS232 GND 4. TO ACTIVATE THE HEADING BOOTSTRAP OUTPUT, SET THE FCS SELECTION 400 Hz Reference TO OTHER THAN "NONE" EVEN WHEN THE SN3500 IS NOT INTERFACED TO AN FCS. Sync Z NOTE 4 Sync X...
Page 143 3. SWITCHES REQUIRED IF SN3500 IS PRIMARY DISPLAY. Category Category Category SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING 4. THE SN3500 MAY BE USED AS A SOURCE OF MAGNETIC HEADING Title Title Title TCAS / TRAFFIC TCAS / TRAFFIC TCAS / TRAFFIC IF REQUIRED BY THE TCAS PROCESSOR.
Page 144 429 OUT B TCAS 429 In B NOTE: 1. SEE MANUFACTURERS INSTALLATION MANUALS FOR COMPLETE WIRING INTERFACE. 2. SN3500 CAN ONLY BE USED AS A SECONDARY DISPLAY. Vista, Ca. Vista, Ca. Vista, Ca. 3. TRAFFIC INTERFACE REQUIRES SN3500 SOFTWARE 2.01 OR HIGHER...
Page 145 4. IN THIS CONFIGURATION A RELAY SENSE ERROR COMPOSITE NAV 1 COMPOSITE WILL BE DISPLAYED ON THE SN3500 WHEN THE SIGNAL GND GNS480 IS SET TO NAV AND THE SN3500 IS SELECTING GPS1. RS232 TXD2 RS232-1 RX SERIAL GND RS232-1 GROUND...
Page 146 DATE REV COMMENTS INITIAL RELEASE WSI Receiver with SN3500 as sole display device. Added WSI AV-300/350 connections Correct pin #'s AV-300/350 TX and Ground (AR tbd) COMPUTER CONTROLLED DRAWING DO NOT REVISE MANUALLY SN3500 WSI INFLIGHT RECEIVER P1 P1 RS232-RX...
Page 147 SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING SN3500 INSTALLATION DRAWING Title Title Title SN3500 with SG102 ARINC 429 or 407 Interface SN3500 with SG102 ARINC 429 or 407 Interface SN3500 with SG102 ARINC 429 or 407 Interface Size Size Size Document Number...
Page 148 TACAN 2B 429/419 B OUT SHIELD GND Notes 1. For distance and range rate when using ARINC 407 TACAN Arinc 407 TACAN, use appropriate SN3500 DME SN3500 interface on associated channel. TACAN 1 TACAN 1A Synchro X OUT TACAN 2B...
Page 149 2. TYCO P/N TT13A9T1/404 toggle switch or equivalent. A push-on/push-off pushbutton switch may be used. Annunciator not required. 3. Use closest available airframe ground. 4. In the event of a broken wire fault the SN3500 will default to daylight (non NVIS) mode. Vista, Ca. Vista, Ca.
Page 150 5. Assure adequate illuminatin of switch and placard for night operations under normal conditions. 6. Use closest available airframe ground. (USING REMOTE GROUND) 7. In the event of a broken wire fault the SN3500 will default to normal SN3500 display (non-reversionary) mode. Reversionary Control Switch Reversionary Control Switch See note 8.