GOODRICH Stormscope Series II User manual

Stormscope®
Series II Weather Mapping Sensor
WX-950
Installation
Manual
This manual contains installation and operating instructions
and recommended flightline maintenance information for
the WX-950 Stormscope®. This information is
supplemented and kept current by Change Notices and
Service Bulletins published by Goodrich Avionics Systems.
009-10950-001 (Rev. C)
Goodrich Avionics Systems, Inc. 11 October 2001
5353 52nd Street, S.E.
Grand Rapids, MI USA 49512

A
Rev. C
ABOUT THIS MANUAL
Chapter 1 – General Information
This chapter includes equipment specifications and a functional description. It describes the various hardware
configurations and includes a list of items furnished and items required but not supplied with the equipment.
Chapter 2 – Installation
This chapter contains instructions for unpacking the equipment and inspection for in-shipment damage. It also
includes information required to locate, assemble and install the equipment.
Chapter 3 – Installation Checkout
This chapter contains instructions for doing post-installation and return to service checkout of the WX-950 using
the Goodrich Avionics SystemsWX-PA Portable Analyzer Kit.
Chapter 4 – Maintenance
This chapter contains general flightline maintenance procedures. It includes periodic maintenance and
troubleshooting; and instructions for the return of defective components.
Appendix A – Signal and Cable Characteristics
This appendix defines the electrical characteristics of all input and output signals.
© Copyright 1996-2001
Goodrich Avionics Systems, Inc.
____________________________
Trademarks
Stormscope® is a registered trademark of Goodrich Avionics Systems, Inc.
Mylar ® and Teflon® are registered trademarks of Dupont.

WX-950
Installation Manual
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Rev. C
LIST OF EFFECTIVE PAGES
Dates of original and changed pages are: Original (Rev. 00)......................9 February 1996
Republished (Rev. B).....................23 April 1999
Republished (Rev. C)............... 11 October 2001
NOTE
The portion of the text affected by the change is indicated by a vertical line in
the outer margins of the page. Changes to illustrations (other than diagrams
and schematics) are identified with a miniature pointing hand. Shading is
used to highlight the area of diagrams and schematics containing a change.
Total number of pages in this publication consists of the following:
Page Change
No. No.
Title Page ......................................................... 0
A Page................................................................ 0
i thru Vi................................................................ 0
1-1thru 1-8........................................................... 0
2-1 thru 2-22........................................................ 0
3-1 thru 3-8.......................................................... 0
4-1 thru 4-14........................................................ 0
A-1 thru A-6......................................................... 0
INSERT LATEST CHANGED PAGES, DESTROY SUPERSEDED PAGES.
Those responsible for maintaining this publication should ensure that all previous changes have been
received and incorporated.

WX-950
Installation Manual
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Rev. C
FOREWORD
This manual provides information intended for use by persons who, pursuant to current regulatory
requirements, are qualified to install this equipment. Because installations vary depending on a particular
aircraft, this manual is intended as a guideline. If further information is required, contact:
Goodrich Avionics Systems
Attn: Customer Service
5353 52nd Street, S.E.
Grand Rapids, MI USA 49512
Tel. [phone] or [phone]
We welcome your comments concerning this manual. Although every effort has been made to keep it free of
errors, some may occur. When reporting a specific problem, please describe it briefly and include the
manual part number, the paragraph/figure/table number, and the page number. Send your comments to:
Goodrich Avionics Systems
Attn: Technical Publications
5353 52nd Street, S.E.
Grand Rapids, MI USA 49512
REVISION C HIGHLIGHTS
Revision “C” is a republication. This republication completely replaces the existing book. It incorporates the
basic manual and all previous changes. New and revised material has been added. Discard previous
editions of the old publication.
This revision will be kept current by change notices. As you receive change notices, replace changed pages
with the corresponding numbered page. A new list of effective pages will be issued with each change. The
list shall reflect the current changes in addition to the tabulation of all previous changes, thus providing a
complete history of the manual.

WX-950
Installation Manual
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Rev. C
TABLE OF CONTENTS
Paragraph Page
Chapter 1
GENERAL INFORMATION
1.1 INTRODUCTION............................................................................................................................1-1
1.2 FUNCTIONAL DESCRIPTION.....................................................................................................1-2
1.3 PHYSICAL DESCRIPTION ...........................................................................................................1-3
1.3.1 Display/Processor ............................................................................................................................1-3
1.3.2 Antenna ..........................................................................................................................................1-4
1.4 SPECIFICATIONS..........................................................................................................................1-5
1.5 INTERFACE....................................................................................................................................1-6
1.6 EQUIPMENT REQUIRED NOT SUPPLIED ...............................................................................1-6
1.7 INSTALLATION APPROVAL........................................................................................................1-6
1.8 WARRANTY INFORMATION .......................................................................................................1-6
1.8.1 Warranty Statement .......................................................................................................................1-6
1.8.2 Related Policies and Procedures.....................................................................................................1-7
Chapter 2
INSTALLATION
2.1 INTRODUCTION............................................................................................................................2-1
2.2 UNPACKING AND INSPECTING................................................................................................2-1
2.3 PRE-INSTALLATION TEST PROCEDURE.................................................................................2-1
2.3.1 Equipment Required.......................................................................................................................2-1
2.3.2 Test Procedure.................................................................................................................................2-2
2.4 ANTENNA LOCATION..................................................................................................................2-3
2.4.1 Interference Sources........................................................................................................................2-4
2.4.2 Skin Current....................................................................................................................................2-4
2.4.3 Skinmapping....................................................................................................................................2-4
2.4.4 Ground Plane...................................................................................................................................2-4
2.4.5 Alignment .....................................................................................................................................2-5
2.4.6 Slipstream .....................................................................................................................................2-5
2.4.7 Site Selection ...................................................................................................................................2-5
2.5 ANTENNA AND DOUBLER INSTALLATION............................................................................2-6
2.6 DISPLAY/PROCESSOR LOCATION.............................................................................................2-8
2.7 CABLE REQUIREMENTS AND FABRICATION........................................................................2-8
2.7.1 Antenna Cable ..............................................................................................................................2-11
2.7.2 Power Cable...................................................................................................................................2-12
2.7.3 Heading Input Cable.....................................................................................................................2-12
2.7.4 Inhibit Line ...................................................................................................................................2-15
2.7.5 Remote Clear Line.........................................................................................................................2-15
2.8 MATING CONNECTOR ASSEMBLY .........................................................................................2-16
2.9 DISPLAY/PROCESSOR INSTALLATION..................................................................................2-20
2.10 PERFORMANCE TEST................................................................................................................2-21

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Rev. C
TABLE OF CONTENTS
Paragraph Page
Chapter 3
INSTALLATION CHECKOUT
3.1 INTRODUCTION ...........................................................................................................................3-1
3.2 CONTROLS.....................................................................................................................................3-1
3.3 POST-INSTALLATION CHECKOUT...........................................................................................3-2
Chapter 4
MAINTENANCE
4.1 INTRODUCTION ...........................................................................................................................4-1
4.2 CONTINUED AIRWORTHINESS.................................................................................................4-1
4.3 PERIODIC MAINTENANCE.........................................................................................................4-1
4.3.1 Display/Processor............................................................................................................................4-1
4.3.2 Antenna ...........................................................................................................................................4-1
4.4 SERVICE MENU............................................................................................................................4-2
4.4.1 System Data ....................................................................................................................................4-2
4.4.2 Fault Log .........................................................................................................................................4-4
4.4.3 CRT Test Pattern............................................................................................................................4-5
4.4.4 Noise Monitor..................................................................................................................................4-6
4.5 FAULT ISOLATION.......................................................................................................................4-8
4.6 TROUBLESHOOTING ELECTRICAL NOISE ..........................................................................4-12
4.7 FUSE REPLACEMENT ...............................................................................................................4-13
4.8 RETURN TO SERVICE CHECK.................................................................................................4-14
4.9 DISPOSITION OF FAILED ITEMS............................................................................................4-14
Appendix A
WX-950 INTERFACE SIGNAL & CABLE CHARACTERISTICS
INTRODUCTION .......................................................................................................................................A-1
SIGNAL CHARACTERISTICS..................................................................................................................A-1

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Rev. C
LIST OF ILLUSTRATIONS
Figure Page
1-1 System Functional Diagram..........................................................................................................1-2
1-2 Display/Processor Unit (P/N 805-10950-001/002)........................................................................1-3
1-3 NY-163 Antenna (P/N 805-10930-001/002) ..................................................................................1-4
1-4 Antenna Doubler Plate (P/N 78-8060-5959-2)..............................................................................1-4
2-1 Test Cable.......................................................................................................................................2-2
2-2 Test Setup.......................................................................................................................................2-2
2-3 Antenna Mounting Holes...............................................................................................................2-6
2-4 Antenna and Doubler Installation................................................................................................2-7
2-5 Interconnect Wiring.......................................................................................................................2-9
2-6 Antenna Cable..............................................................................................................................2-11
2-7 Antenna Cable Preparation.........................................................................................................2-11
2-8 Heading Input Cable....................................................................................................................2-13
2-9 Heading Input Cable Preparation...............................................................................................2-14
2-10 Mating Connector.........................................................................................................................2-16
2-11 Heading Flag (KCS55) Connection.............................................................................................2-29
2-12 Instrument Panel Cutout and Mounting Holes .........................................................................2-20
2-13 Display/Processor Installation ....................................................................................................2-21
3-1 Controls ..........................................................................................................................................3-1
3-2 Self-Test in Progress......................................................................................................................3-2
3-3 Self-Test Passed.............................................................................................................................3-2
3-4 Recoverable Error Message...........................................................................................................3-3
3-5 Fatal Error Message......................................................................................................................3-3
3-6 360°Weather View at 200 nmi Range..........................................................................................3-4
3-7 Aircraft Test Setup.........................................................................................................................3-5
3-8 WX-PA Antenna Alignment ..........................................................................................................3-6
4-1 Service Menu..................................................................................................................................4-2
4-2 System Data, Page 1......................................................................................................................4-3
4-3 System Data, Page 2......................................................................................................................4-4
4-4 System Data, Page 3......................................................................................................................4-4
4-5 Fault Log ........................................................................................................................................4-5
4-6 CRT Test Pattern...........................................................................................................................4-6
4-7 Noise Monitor.................................................................................................................................4-6
4-8 Test Strikes ....................................................................................................................................4-7
4-9 Replacing the Fuse.......................................................................................................................4-13

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Rev. C
List of Tables
Table Page
1-1 WX-950 System Part Numbers.....................................................................................................1-1
1-2 Antenna Cable Part Numbers.......................................................................................................1-1
1-3 WX-950 Installation Kit P/N 817-10950-001 ...............................................................................1-1
1-4 Hardware Package P/N 817-10951-001........................................................................................1-1
2-1 Heading Input Cable Vendors ....................................................................................................2-13
2-2 Stepper Input Connections (KI-525 Indicator)..........................................................................2-14
2-3 Synchro Connections to Mating Connectors ..............................................................................2-15
2-4 Antenna Cable Connections........................................................................................................2-16
2-5 Heading Input Connections ........................................................................................................2-17
2-6 Configuration Jumpers ...............................................................................................................2-17
2-7 Jumper Configuration Resistance..............................................................................................2-18
4-1 Error Messages..............................................................................................................................4-9

WX-950
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Rev. C
CHAPTER 1
GENERAL INFORMATION
1.1 INTRODUCTION
This section contains a functional description of the Stormscope® model WX-950 Series II weather
mapping system, outlines the main features of the system, and provides a functional block diagram. The
basic WX-950 System (see table 1-1) consists of the following equipment:
•Display/Processor P/N 805-10950-001 (Black Bezel) or P/N 805-10950-002 (Gray Bezel)
•NY-163 Antenna P/N 805-10930-001 (White) or P/N 805-10930-002 (Black)
•Installation Kit P/N 817-10950-001
•Antenna Cable (ordered separately). Antenna cables, with the antenna connector pre-wired to
one end, are available in 6, 12, 25, 50 and 75 ft. lengths (see table 1-2). To meet different space
requirements the antenna connector can be ordered with either a straight or right-angle
backshell. Most installations will require the right-angle backshell.
Components supplied with the installation kit are identified in tables 1-3 and 1-4.
Table 1-1. WX-950 System Part Numbers
BEZEL ANTENNA
SYSTEM P/N BLACK GRAY WHITE BLACK
830-10950-001 X X
830-10950-002 X X
830-10950-003 X X
830-10950-004 X X
Table 1-2. Antenna Cable Part Numbers
PART NUMBER
LENGTH
(ft.) RIGHT-ANGLE BACKSHELL STRAIGHT BACKSHELL
6 803-10950-004 803-10952-004
12 803-10950-005 803-10952-005
25 803-10950-001 803-10952-001
50 803-10950-002 803-10952-002
75 803-10950-003 803-10952-003
Table 1-3. WX-950 Installation Kit P/N 817-10950-001
QUANTITY PART NUMBER DESCRIPTION
1 78-8060-5979-2 Antenna Doubler Plate
1 78-8060-5977-6 Antenna Gasket
1 817-10951-001 Hardware Package (see table 1-4)
Table 1-4. Hardware Package P/N 817-10951-001
QUANTITY PART NUMBER DESCRIPTION
1 814-10956-001 Rear Cable Connector Assembly
1 814-10959-001 Connector Shell Assembly
1 78-8060-5733-3 Circuit Breaker Label
1 606-10010-001 Cable Clamp, 7/16”
1 606-10009-001 Cable Clamp, 3/8”
2 606-10012-001 Cable Tie, 5-5/8”
2 101-10091-001 Brass Locking Terminal
4 100-10075-001 Screw, 6-32 x 1/2 PP SS Black Oxide UNC-2A
3 101-10098-001 Stop Nut, Elastic 10-32 S.S.
2 26-1004-1394-2 Washer, .2 ID x .325 OD S.S.
3 26-1004-9316-7 Stop Nut, Elastic 4-40
2 26-1004-9152-6 Screw, 10-32 x 1 1/2 PPH S.S.
2 26-1010-0057-3 Screw, 10-32 x 3/8 TRUS PH S.S.

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Rev. C
1.2 FUNCTIONAL DESCRIPTION
The WX-950 is a TSO certified thunderstorm mapping system designed for airborne use. The system maps
electrical discharge activity 360 degrees around the aircraft to a distance of 200 nautical miles. Figure 1-1
is a simplified functional diagram that shows how the components are connected to each other and to other
aircraft systems.
Figure 1-1. System Functional Diagram
The WX-950 is a passive system that listens for electromagnetic signals with a receiving antenna. The
antenna detects intra-cloud, inter-cloud, or cloud-to-ground electrical discharges within a 200-nmi radius of
the aircraft and sends the resulting “discharge signals”to the display/processor. The processor digitizes,
analyzes, and converts the discharge signals into range and bearing data. This information is stored in the
storm buffer. The display shows discharges as cell or strikes depending on the display mode selected.
To maintain proper storm display orientation during turns, the WX-950 can be connected to an external
heading source. The heading source may be synchro XYZ or stepper (King KCS55) format.

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Rev. C
1.3 PHYSICAL DESCRIPTION
The WX-950 System consists of two main components; Display/Processor (P/N 805-10950-001/002) and NY-
163 Antenna (P/N 805-10930-001/002).
1.3.1 Display/Processor
The display/processor (see figure 1-2) houses the processing circuitry as well as the CRT display panel and
the pilot’s operating controls. The Display/processor can mount in a 3ATI panel cutout from the front or
rear. No mounting tray is required, although a mooring plate may be purchased for increased stability in
high-vibration environments. Refer to paragraphs 2.6 and 2.9 for guidelines relating to mounting location
and installation. Connection is made through a mating connector assembly (refer to paragraph 2.8) that
attaches to a single 25 pin D-subminiature connector on the back panel.
Figure 1-2. Display/Processor Unit (P/N 805-10950-001/002)

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Rev. C
1.3.2 Antenna
The antenna (see figure 1-3) is a combined cross-loop and sense antenna. Connection is made through a
single 10-pin connector (refer to paragraph 2.7.1). It is mounted to the aircraft using a doubler plate (see
figure 1-4) supplied with the installation kit (see table 1-1). The antenna is sealed against environmental
extremes and is non-repairable. To inhibit the build-up of precipitation-static the antenna is coated with
conductive paint and should not be repainted. Refer to paragraphs 2.4 and 2.5 for guidelines relating to
mounting location and installation.
Figure 1-3. NY-163 Antenna (P/N 805-10930-001/002)
Figure 1-4. Antenna Doubler Plate (P/N 78-8060-5979-2)

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Rev. C
1.4 SPECIFICATIONS
SIZE:Display/Processor (including mating connector assembly)
3.37 inches (8.56 centimeters) high
3.37 inches (8.56 centimeters) wide
11.33 inches (28.78 centimeters) deep
Antenna
1.00 inches (2.54 centimeters) high
3.45 inches (8.76 centimeters) wide
6.85 inches (17.40 centimeters) deep
WEIGHT:
Display/Processor
2.9 lb (1.3 kg)
Antenna (without doubler)
0.84 lb (0.38 kg)
TEMPERATURE:
Display/Processor
-20 to +55 degrees Celsius (-4 to +131 degrees Fahrenheit)
Antenna
-55 to +70 degrees Celsius (-67 to +158 degrees Fahrenheit)
ALTITUDE:
Display/Processor
35,000 feet (Maximum)
Antenna
55,000 feet (Maximum)
COOLING:
Conduction and Forced Air (Internal Fan) Convection
DISPLAY RANGE:
25, 50, 100, & 200 nmi
TSO COMPLIANCE:
TSO-C110a
RTCA COMPLIANCE:
Display/Processor Environmental
DO-160C Category C1-BA(NBM)XXXXXXZ(AB)ABZTZAZE3XX
Display/Processor Software
DO-178B Level D
Antenna
DO-160C Category F2-AC(YCLM)XSFXXXXXXXZXZXXE3XX
POWER REQUIREMENTS:
Input voltage: 11 to 32 VDC
Current: 2.0 A ± 0.5 A @ 12 VDC
0.8 A ± 0.25 A @ 28 VDC

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Rev. C
1.5 INTERFACE
The electrical characteristics of all input and output signals are detailed in Appendix A.
1.6 EQUIPMENT REQUIRED NOT SUPPLIED
Circuit Breaker The WX-950 is protected via an internal fuse (see para 4.6). For external
circuit breaker protection, a 5 A circuit breaker is recommended for 14 V
aircraft systems and a 3 A circuit breaker for 28 V systems.
12 to 28 VDC Power Supply Power supply capable of providing 12 to 28 VDC at 30 Watts is required to
do the pre-installation test procedure.
WX-950 Test Cable This cable is required to do the pre-installation test procedure. The cable
can be purchased from Goodrich Avionics Systems (P/N 803-10950-001) or
fabricated from the details provided in figure 2-1.
WX-SM Skinmapper WX-SM Skinmapper (P/N 78-8060-5859-6 with Mod. 2 (P/N 816-10012-001)
installed) is required to verify the suitability of a selected WX-950 antenna
location.
WX-PA Portable Analyzer WX-PA Portable Analyzer Kit (P/N 78-8060-5791-1) is required to do the
post installation checkout.
Surface Preparation Alodine 1001, required for installation of the Stormscope®antenna.
Antenna Sealant For pressurized aircraft, use a sealant meeting the requirements of SAE
AMS-S-8802 such as Flamemaster CS3204 Class B. For non-pressurized
aircraft, use a non-corrosive sealant that meets the physical requirements
of MIL-A-46146 such as General Electric RTV162.
Heading Input Cable This cable provides aircraft heading information to the WX-950. See
paragraph 2.7.3. for cable specification and requirement.
Synchro Inverter If 400Hz synchro drive is not available.
1.7 INSTALLATION APPROVAL
The installation of Stormscope®systems, if not installed under a type certificate or supplemental type
certificate, must be treated as a major alteration on F.A.A. form 337. Application for approval may be made
at any F.A.A. Air Carrier, General Aviation, or Flight Standards district Office.
1.8 WARRANTY INFORMATION
The Stormscope®WX-950 Weather Mapping System is warranted for two years from the date of
installation (not to exceed 30 months from the date of shipment from Goodrich Avionics Systems) subject to
the following limitations.
1.8.1 Warranty Statement
Goodrich Avionics Systems, (hereinafter called Goodrich Avionics Systems), warrants each item of new
equipment manufactured or sold by Goodrich Avionics Systems to be free from defects in material and
workmanship, under normal use as intended, for a period of 30 months from date of shipment by Goodrich
Avionics Systems to an authorized facility, or 24 months from date of installation by an authorized facility,
whichever occurs first. No claim for breach of warranties will be allowed unless Goodrich Avionics Systems
is notified thereof, in writing, within thirty (30) days after the material or workmanship defect is found.
The obligation of Goodrich Avionics Systems shall be limited to replacing or repairing at its factory the
equipment found defective under terms of this warranty certificate; providing that such equipment is
returned in an approved shipping container, transportation charges prepaid, to Goodrich Avionics Systems,
Grand Rapids, Michigan, or such other location as Goodrich Avionics Systems may authorize. Goodrich
Avionics Systems reserves the right to have necessary repairs performed by an authorized agency.

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This warranty shall not apply to any unit or part thereof which has not been installed or maintained in
accordance with Goodrich Avionics Systems instructions, or has been repaired or altered in any way so as
to adversely affect its performance or reliability, or which has been subjected to misuse, negligence or
accident.
This warranty is exclusive and is accepted by buyer in lieu of all other guaranties or warranties express or
implied, including without limitation the implied warranties of merchantability and fitness for a particular
purpose. Buyer agrees that in no event will Goodrich Avionics Systems liability for all losses from any
cause, whether based in contract, negligence, strict liability, other tort or otherwise, exceed buyer’s net
purchase price, nor will Goodrich Avionics Systems be liable for any special, incidental, consequential, or
exemplary damages.
Goodrich Avionics Systems reserves the right to make changes in design or additions to or improvements in
its equipment without the obligation to install such additions or improvement in equipment theretofore
manufactured.
1.8.2 Related Policies and Procedures
1. If the original registered owner of a WX-950 system sells the aircraft in which the system is installed
during the warranty period, the remaining warranty may be transferred. Written notification of the
transaction must be submitted by the initial recipient of the warranty to:
ATTENTION: WARRANTY ADMINISTRATOR
Goodrich Avionics Systems
5353 52nd Street, S.E.
Grand Rapids, MI 49512
U.S.A.
2. Equipment must be installed by a Goodrich Avionics Systems authorized dealer or installer.
Installation of equipment by facilities not specifically authorized will void the equipment warranty.
3. Notice of a claimed product defect must be given to Goodrich Avionics Systems or a designated
Goodrich Avionics Systems Service Agency within the specified warranty period.
4. A product which is defective in workmanship and/or material shall be returned to Goodrich Avionics
Systems via any Authorized Dealer with transportation charges prepaid. After correction of such
defects, the equipment will be returned to the Dealer, transportation prepaid by Goodrich Avionics
Systems via surface transportation. Any other means of transportation must be paid by the customer.
The risk of loss or damage to all products in transit shall be assumed by the party initiating the
transportation of such products. All items repaired or replace hereunder shall be warranted for the
unexpired portion of the original warranty.
5. Goodrich Avionics Systems is in no way obligated or responsible for supporting or participating in the
costs of the installation warranty. The entire responsibility lies with the Goodrich Avionics Systems
Authorized Dealer making the installation. Goodrich Avionics Systems is only responsible for the
product warranties outlined in paragraph 1.8.1.
6. Goodrich Avionics Systems cannot authorize warranty credit for troubleshooting of other systems in
the aircraft in order to reduce noise interference with the WX-950 system.

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WX-950
Installation Manual
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Rev. C
CHAPTER 2
INSTALLATION
2.1 INTRODUCTION
Installation must be made by qualified personnel, in conformance with applicable government regulations.
The information furnished is for convenience only.
NOTE
Tolerances (unless otherwise indicated):
ANGLES ARE ± 1°
.00 TWO PLACE DECIMALS ARE ± .02
.000 THREE PLACE DECIMALS ARE ±. 010
This section describes the installation of Stormscope Series II Model WX-950, in a step by step procedure.
The installation activities in this section will be performed in the following order:
•Determine component locations.
•Install the cables.
•Install the system components.
2.2 UNPACKING AND INSPECTING
CAUTION
The display/processor and antenna are sensitive to electrostatic discharge
(ESD) and may be damaged if not handled correctly. Do not remove protective
covers from electrical connectors during unpacking. Touching an exposed
connector may cause electrostatic damage to equipment.
Carefully unpack the system and note any damage to shipping containers or equipment. Visually inspect
each component for evidence of damage. Compare the equipment received with that noted on the packing
list. Immediately report any missing items or evidence of damage to the carrier making the delivery. To
justify a claim, retain the original shipping container and all packing materials.
Every effort should be made to 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. The ambient temperature of the storage area should not
fall below -55° C (-65° F) or rise above 70° (158° F).
2.3 PRE-INSTALLATION TEST PROCEDURE
Goodrich Avionics Systems recommends testing each display/processor and antenna immediately upon
receipt. The pre-installation test procedure verifies operation of the system and may save valuable
installation time by detecting hidden damage that may have occurred during shipment.
2.3.1 Equipment Required
a. System components to be tested.
1). WX-950 Display/Processor
2). NY-163 Antenna
b. DC Power Supply: 12 to 28 VDC, 30W, or equivalent (not supplied).

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c. WX-950 Test Cable P/N 803-10951-001. The bench test cable may be purchased directly from Goodrich
Avionics System, or one may be fabricated (unterminated cable may be purchased from Electronic
Cable Specialists - ECS P/N 312207) from the details provided in figure 2-1.
Figure 2-1 Test Cable
2.3.2 Test Procedure CAUTION
Before connecting/disconnecting cables, ensure that all power is removed.
1. Connect the equipment as shown in figure 2-2.
Figure 2-2 Test Setup
2. Rotate the OFF/BRT knob clockwise about 180 degrees. After approximately 15 seconds, the
initialization screen will be displayed. During initialization, the system runs a series of self-tests to
ensure that all functions are operating properly. These tests are designed to check the antenna,
processor, and associated hardware.
3. If no faults are detected, at completion of the self-test an “ALL TESTS PASSED”message will be
displayed.

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4. After completion of the self-test, verify that the WX-950 is in the weather mapping mode; 200 nmi,
360°view.
5. Verify that clockwise rotation of the OFF/BRT knob increases display brightness and counter-
clockwise rotation decreases brightness. The screen should be completely dark with the control fully
counter-clockwise. Adjust to a comfortable viewing level.
NOTE
Paragraph 3.2 contains a description of all operating controls.
6. Verify operation of the pushbuttons:
a. Press softkey (A), i.e., MENU. This should cause the system menu to be displayed with “Weather
View”menu item highlighted.
b. Press softkey (B), i.e., 360°. The display should return to the weather mapping mode, 360°
Weather View at the 200 nmi range.
c. Press softkey (C), i.e., down-arrow. The weather view range should change to 100 nmi.
d. Press softkey (D), i.e, up-arrow. The weather view range should return to 200 nmi.
7. If correct results are obtained, the system is operating properly. Immediately report any problems to
our Customer Service Department at 1-800-453-0288 or 1-616-949-6600.
2.4 ANTENNA LOCATION
Because Stormscope®weather mapping systems detect electrical discharge activity, antenna placement
relative to other active electrical components is critical. The antenna must be placed at a location that is
free from excessive electrical interference. The ideal location varies from aircraft to aircraft. To ensure an
interference-free antenna location, every aircraft must be skimapped prior to installation of the
Stormscope®antenna. The skinmap must be done with the engines and all electrical systems operating.
Refer to the WX-SM Skinmapper Instruction Manual (P/N 78-8060-5874-5).
NOTE
The Stormscope®requirement for an antenna ground plane and a noise free
environment complicates installation in aircraft with wood, fabric or
composite construction. Each aircraft needs to be analyzed individually for
the best antenna location. Before starting an installation in one of these
types of aircraft, contact Goodrich Avionics Systems Field Service
Engineering at [phone] or [phone].

WX-950
Installation Manual
2-4
Rev. C
2.4.1 Interference Sources
Avoid mounting the antenna near active electrical components whenever possible. General clearance
guidelines are:
•Strobe lamps and power supplies - 5 ft. (1.5 meters)
•Pitch trim servos and amplifiers - 3 ft. (1 meter)
•Fluorescent lamps and ballasts - 5 ft. (1.5 meters)
•Heater ignitors - 5 ft. (1.5 meters)
•Air conditioner and heater blowers - 5 ft. (1.5 meters)
•DME/Transponder/TCAS antennas - 4 ft., Minimum (1.2 meters)
•Inflight telephone antennas - 4 ft. (1.2 meters)
•VHF comm. antennas - 1 ft. (.3 meters)
•ADF antennas - 1 ft. (.3 meters)
•Any current-carrying cable - 2 ft. (0.6 meters)
Stormscope®sensors are adversely affected by the build up of static charges. Do not mount the antenna
near any composite materials (e.g., plastic covers, radomes, fiberglass housings, windows, etc.) as these
devices can build up objectionable static charges.
2.4.2 Skin Current
Avoid mounting the antenna in the ground return
current path between the battery and alternator,
and the battery and blower motors or other heavy
current carrying equipment. Aircraft skin currents
may cause antenna interference.
ANTENNA
BATTERY
ALTERNATOR
SKIN CURRENT
2.4.3 Skinmapping
In order to reduce potential interference problems, some of which are evident only during flight, a skinmap
of the aircraft must be performed (with engines and all electrical systems operating) prior to every
installation. This procedure will save installation time by avoiding the necessity for such things as antenna
relocation. A WX-SM Skinmapper (Goodrich Avionics Systems P/N 78-8060-5859-6, with Mod 2 installed)
must be used to verify the suitability of a selected antenna location before proceeding with the installation.
This must be done even if all the other placement criteria are met.
2.4.4 Ground Plane
The antenna must mount in a location with a
minimum of 12 inches (30 cm) continuous
aluminum ground plane in all directions. Avoid
hinge lines, gear doors, and access panels by at
least 12 inches (30 cm). Do not mount the antenna
on an access panel.
ACCESS PANEL
ANTENNA
12" MIN.