Garmin GNC 300TSO INSTALLATION MANUAL

GNC 300

INSTALLATION MANUAL

GARMIN INTERNATIONAL, INC.	PART NUMBER: 190-00067-02
1200 E. 151st STREET	REVISION J, 30 MARCH 1998
OLATHE, KANSAS 66062-3426

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Garmin Corporation

This publication is the proprietary property of Garmin International Inc. It may not be reproduced or transmitted in any form whether printed or electronic, without the expressed written consent of Garmin International.

Garmin International, Inc.

1200 E. 151st Street

Olathe, KS 66062

U.S.A.

REVISION RECORD

ECO #	Rev.	Date of Rev.	Description	FAA Approval

Initial	Rev. A, 01 Oct 1995		Initial release
5074	Rev. B, 05 Jan 1996		Clarify Mid Continent annun units GA 56 Mod 1
5219	Rev. C, 29 Jan 1996		Add MCI options
5827	Rev. D, 18 June 1996		Add STC. Chg to barrel type crimp connectors.
6042	Rev. E, 23 Aug 1996		Chg Fig. 1-3A to agree with MCI's.
6274	Rev. F, 22 Oct 1996 Correct btry pinout chart
7708	Rev. G, 10 Dec 1997		Add antenna, chg btry GPN
8322	Rev. H, 28 Jan 1998		Chg to/from voltage
8452	Rev. J, 30 Mar 1998		Corr to btry pk s/n & misc. chgs.

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	TABLE OF CONTENTS
SECTION 1	GENERAL DESCRIPTION
1.1	INTRODUCTION
1.2	TECHNICAL CHARACTERISTICS
1.2.1	PHYSICAL CHARACTERISTICS
1.2.2	OPERATIONAL CHARACTERISTICS
1.2.3	INTERFACES
1.3	LICENCE REQUIREMENTS
SECTION 2	INSTALLATION CONSIDERATIONS
2.1	ANTENNA CONSIDERATIONS
2.1.1	GPS ANTENNA LOCATION
2.1.2	COMM ANTENNA LOCATION
2.1.3	ELECTRICAL BONDING
2.1.4	ANTENNA LIMITATIONS
2.1.5	VHF COMM INTERFERENCE OF GPS
2.1.6	COMM ANTENNA INSTALLATION CONSIDERATIONS
2.2	RACK CONSIDERATIONS
2.2.1	ACCESSIBILITY
2.3	CABLING AND WIRING
2.4	COOLING AIR
2.5	MINIMUM INSTALLATION REQUIREMENTS
2.6	EXTERNAL ALTITUDE INPUT
SECTION 3	INSTALLATION PROCEDURE
3.1	INSTALLATION ACCESSORIES
3.2	ANTENNA INSTALLATION
3.3	CABLE INSTALLATION
3.4	RACK INSTALLATION
3.5	GNC 300 INSTALLATION AND REMOVAL
3.6	COMM ANTENNA INSTALLATION CHECK
SECTION 4	POST INSTALLATION CONFIGURATION &
	CHECKOUT PROCEDURE
SECTION 5	CERTIFICATION
SECTION 6	CONTINUED AIRWORTHINESS
APPENDIX A	CERTIFICATION DOCUMENTS
APPENDIX B	CONNECTOR CHANGES
APPENDIX C	STC PERMISSION

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	LIST OF ILLUSTRATIONS
FIGURE
1-1	PINOUT DEFINITION, 37 PIN DSUB
1-2	PINOUT DEFINITION, 26 PIN HD-DSUB
1-3	INTERCONNECT SCHEMATIC
1-4	INTERCONNECT SCHEMATIC NOTES
2-1	GPS ANTENNA INSTALLATION CONSIDERATIONS
2-2	GNC 300 INSTALLATION CONSIDERATIONS
2-3	SWITCH/ANNUNCIATOR LAYOUT
3-1	STUD MOUNT GA 56 INSTALLATION
3-2	FLANGE MOUNT GA 56 INSTALLATION
3-3	COAX CABLE INSTALLATION
3-4	AVIATION RACK DIMENSIONS
3-5	AVIATION RACK INSTALLATION

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SECTION 1 GENERAL DESCRIPTION

1.1 INTRODUCTION

This manual describes the physical, mechanical, and electrical characteristics and the installation requirements for the GNC 300 Aviation Kit.

After installation of the GNC 300 system, FAA Form 337 must be completed by an appropriately certificated agency to return the aircraft to service.

1.2TECHNICAL CHARACTERISTICS

The GNC 300 offers the versatility of fixed installation in a panel mounted aviation rack as well as complete portability.

For TSO Compliance, see Appendix A.

The conditions and tests required for TSO approval of this article are minimum performance standards. It is the responsibility of those desiring to install this article either on or within a specific type or class of aircraft to determine that the aircraft installation conditions are within the TSO standards. The article may be installed only if further evaluation by the applicant documents an acceptable installation and is approved by the Administrator.

1.2.1 PHYSICAL CHARACTERISTICS
Width:	6.25 inches
Height:	2 inches
Depth:	5.65 inches
GNC 300 Weight:	2.4 lbs.
GA 56 Antenna Weight:	4 oz.
Aviation Rack Weight:	10 oz.
Max Air Speed:	Subsonic
(Structural rating for antenna)
1.2.2 OPERATIONAL CHARACTERISTICS
Operating Temperature Range:	-20 oC to +55 oC
Humidity:	95% non-condensing
Altitude Range:	-1,500 to 50,000 ft.
Power Range	10 to 15.1 VDC
Power Requirements:	1.2A @ 13.8v (not transmitting)
	5.5A @ 13.8V (transmitting)
1.2.3 INTERFACES

The GNC 300 provides interfaces to various general aviation instruments. Figure 1- 1 defines the function of each pin on the 37 pin DSUB connector located at the back

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of the rack. Figure 1-2 defines the function of each pin in the 26 pin HD-DSUB connector (J102) located above the 37 pin connector at the back of the rack. Figures 1-3 and 1-4 defines the interconnects between the rack and other instruments. The following interfaces are provided.

1.2.3.1 37 PIN CONNECTOR (J101)

CDI:	Capable of driving up to three 1000 ohm parallel
(Pins 1 and 4)	loads, +150 millivolts full scale deflection with a
	maximum output of +300 millivolts.
To/From:	Capable of driving up to three 200 ohm parallel
(Pins 2 and 4)	loads, +82 millivolts full scale deflection.
	Units with Mod Status 1: +190 millivolts full scale deflec-
	tion.
Nav Flag:	Capable of driving up to three 1000 ohm parallel
(Pins 3 and 4)	loads, 375 millivolts for flag out-of-view, and
	+40 millivolts for flag in-view.
OBI data:	Output providing bearing to waypoint data for a
(Pins 7, 8, and 23)	Bendix/King RMI (KI 229 or equivalent).
Message annunciator:	Output capable of driving negative logic message
(Pin 20)	annunciators by sinking up to 500mA.

RS232 chan 1 output data: Output capable of driving devices as listed in Section 4. (Pin 24) Conforms to the EIA specification RS-232C.

RS232 chan 2 output data: Output capable of driving devices as listed in Section 4. (Pin 19) Conforms to the EIA specification RS-232C.

RS232 chan 1 input data:	Input capable of receiving data from devices listed in
(Pin 17)	Section 4. Conforms to the EIA specification RS-232C.
Arrival annunciator:	Output capable of driving negative logic annunciator
(Pin 12)	by sinking up to 500mA.
GPS approach active ann:	Output capable of driving negative logic annunciator
(Pin 13)	by sinking up to 500mA. See GNC 300 Pilot's Guide,
	(GPN 190-00067-00), for more information.
GPS approach arm ann:	Output capable of driving negative logic annunciator
(Pin 28)	by sinking up to 500mA. See GNC 300 Pilot's Guide,
	(GPN 190-00067-00), for more information.

ARINC 429 Output A & B: Output capable of interfacing with any device that has

(Pins 15 and 16)	an input conforming to the GAMA ARINC 429 (low
Av. Kit Install. Manual	speed) specification.
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NAV Super Flag Output:	Output capable of driving positive logic NAV Super
(Pin 10)	Flag by sourcing up to 500mA for flag out of view (NAV
	valid).
RS422 input:	Input capable of receiving serial OBS data from
(Pins 11 & 27)	Collins Pro Line 2 EFIS DSP unit.
GPS approach arm low:	Input, when grounded, controls approach mode.
(Pin 9)
GPS OBS:	Capable of interfacing with a standard OBS resolver.
(Pins 4,14,35 and 37)
ARINC 429 Input A & B:	Input capable of receiving data from ARINC 429 (low
(Pins 32 & 33)	speed) devices as listed in Section 4.

Battery +,-, Charge Enable Connection for GARMIN remote battery accessory. (Pins 30, 34, 29)

1.2.3.2 26 PIN CONNECTOR (J102)

MIC Audio Hi and Lo::	Input requiring 275mV RMS into 470 ohm load.
(Pins 2 and 3)	(Standard carbon or dynamic MIC containing
	transistorized pre-amp.)
MIC Key:	Input, when grounded, keys the transmitter.
(Pin4)
COMM Audio Hi and Lo:	Output capable of driving a 500 ohm load with
(Pins 5 and 6)	100mW.
MIC Intercomm:	Input requiring 125mV RMS into 470 ohm load.
(Pin 8)	(Standard carbon or dynamic MIC containing
	transistorized pre-amp.)
Remote Transfer:	Input, when grounded, swaps the active and
(Pin 10)	standby COMM frequencies.
TX Interlock:	Input, when grounded, reduces receiver sensitivity
(Pin 12)	so squelch will not break when another transceiver is
	keyed.
Altimeter input:	Capable of receiving encoded output data from any
(Pins 14-24)	parallel altimeter device.
Remote Enter:	Input, when ground, functions the same as the enter
(Pin 26)	key on the GNC 300 front panel.

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Sequence Hold Low:	Input, when grounded, activates HOLD mode. See
(Pin 13)	the GNC 300 Pilot's Guide (GPN 190-00067-00) for
	more information.

1.2.3.3 COMM Antenna Connector (J4)

Capable of providing 5 watts, minimum, at 13.8V. Sensitivity of 6 dB SNR, minimum, at 2 uV hard. The COMM antenna shall be approved to TSO C37( ) and C38( ).

1.3LICENCE REQUIREMENTS

The transmitter, as installed in the aircraft, requires an Aircraft Radio Station Licence. This licence is obtained by filing the FCC Form 404. While awaiting the receipt of the station licence, a copy of FCC Form 404 is kept in the aircraft.

This equipment has been type accepted by the FCC and entered on the type accepted equipment list, as GARMIN GNC 300 and must be identified as GARMIN GNC 300 on your Form 404, Aircraft Radio Station Licence application.

CAUTION

THE VHF TRANSMITTER IN THIS EQUIPMENT IS GUARANTEED TO MEET FEDERAL COMMUNICATIONS COMMISSION ACCEPTANCE OVER THE OPERATING TEMPERATURE RANGE. MODIFICATIONS NOT EXPRESSLY APPROVED BY GARMIN COULD VOID THE LICENCES' AUTHORITY TO OPERATE THE EQUIPMENT.

SECTION 2 INSTALLATION CONSIDERATIONS

Careful planning and consideration of the suggestions in this section are required to achieve the desired performance and reliability from the GNC 300.

2.1 ANTENNA CONSIDERATIONS

2.1.1 GPS ANTENNA LOCATION

The GNC 300 GA 56 Antenna must be mounted on top of the aircraft. For best performance select a location with an unobstructed view of the sky above the aircraft when in level flight. Figure 2-1 illustrates a typical GPS antenna installation.

For rotorcraft, locate the GA 56 antenna:

1)As far from the main rotor hub as possible. This reduces the percentage of time the blade blocks the antenna.

2)As far below the blade surface as possible if installing the antenna under the blade. This reduces signal distortion caused by the blades.

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The antenna should be located at least 3 feet from transmitting antennas such as VHF Comm, HF transmitter, DME, Transponder, and Radar.

2.1.2 COMM ANTENNA LOCATION

The COMM antenna should be well removed from all projections, engines and propellers. The ground plane surface directly below the antenna should be a flat plane over as large an area as possible (18 inches square minimum).

The antenna should be mounted a minimum of 6 feet away from any DME antennas, 4 feet from any ADF sense antennas, and a minimum of 3 feet from the GNC 300 and its GPS antenna.

The GNC 300 COMM antenna connector is specified to have installed GPN 330-00067- 00 (1.57542 GHz notch filter) to minimize interfering harmonics.

2.1.3 ELECTRICAL BONDING

No special precautions need to be taken to provide a bonding path between the GPS antenna and the aircraft structure.

Follow the manufacturers instructions for the COMM antenna.

2.1.4 ANTENNA LIMITATIONS

GARMIN'S GA 56 Antennas are recommended for installations where the airspeed of the aircraft will be subsonic.

GARMIN's GA 56, Mod 1 or later, must be used.

See the COMM antenna specification for its limitations.

2.1.5 VHF COMM INTERFERENCE OF GPS

On many panel-mounted aircraft, VHF COMM's can radiate strong harmonics from the unit and antenna. The GNC 300 COMM section will not interfere with its GPS section. However, placement of the GNC 300 GPS antenna relative to all COMM's and COMM antenna, including its own, is critical.

Use the following guidelines, in addition to others in this document, when locating the GNC 300 and its antennas.

GPS Antenna:	Locate as far as possible from all COMM antennas
	and all COMMs (including the GNC 300). The GPS
	antenna will be much less sensitive to COMM antennas that
	use a 1.57542 GHz notch filter.
GNC 300:	Locate as far as possible from all COMM antennas.

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If a COMM antenna is found to be the problem, a 1.57542 GHz notch filter (GPN 330- 00067-00) may be installed in the VHF COMM coax, as close to the COMM as possible. This filter (GPN 330-00067-00) is required for the GNC 300 transmitter).

If a COMM is found to be radiating, the following can be done:

1)Replace or clean VHF COMM rack connector to assure good coax ground.

2)Place a grounding brace between the GNC 300, VHF COMM, and ground.

3)Shield the VHF COMM wiring harness.

2.1.6COMM ANTENNA INSTALLATION INSTRUCTIONS

The COMM antenna should be installed according to the manufacturer's recommendations.

2.2 RACK CONSIDERATIONS

2.2.1 ACCESSIBILITY

Plan a location which gives the pilot complete and comfortable access to the entire keypad and which is plainly visible from the pilot’s perspective. Check that there is adequate depth for the rack in the instrument panel. A location away from heating vents or other sources of heat generation is optimal. Figure 2-2 illustrates a typical aviation rack installation.

2.3CABLING AND WIRING

The recommended antenna cable type for both antennas is M17/155-0001 (RG-58A/ U) per MIL-C-17. Maximum allowable length for the GPS antenna using this cable type is 40 feet. Other cable types with 50 ohms nominal impedance and longer lengths can be used for the GPS antenna, provided the installer insures that the attenuation does not exceed 10dB at 1.5 GHz for the specific installation. Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling, particularly the COMM antenna cable, and routing near aircraft control cables.

Cabling for the GNC 300 should not be routed near components or cabling which are sources of electrical noise.

Do not route the COMM antenna cable near any ADF antenna cables.

Route the GPS antenna cable as far as possible away from all COMMs and COMM antenna cable.

2.4COOLING AIR

Cooling air is not required for the GNC 300 but is highly recommended because, as with any electronic equipment, reduced operating temperature can contribute to increased reliability. Additionally, location of the GNC 300 in a stack of other power

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dissipating equipment can produce unacceptably high ambient air temperatures around the unit. A 5/8 inch diameter air fitting is provided on the rear of the mounting rack for the purpose of admitting cooling air under such conditions.

2.5MINIMUM INSTALLATION REQUIREMENTS

Below is a list of required devices for A1 and A2 certification. Figure 1-3 shows various equipment that can be used. For a specific list of equipment used in the initial STC see GPN 190-00067-06. Deviations from this equipment should be approved by the FAA or the governing organization.

Pressure Altitude Device

This device delivers pressure altitude data to the GNC 300. This data can come from an encoder or serializer.

Manual Course Device

This device delivers the manual course selected to the GNC 300. Course information can come from an analog resolver or from an EFIS via the ARINC 429 bus or RS-422 bus.

HSI/CDI Device

This device displays Nav Flag, Left/Right and To/From. This can be displayed on the EFIS or HSI.

External Annunciators		and Switches
NAV		Annunciator
GPS		Annunciator
NAV/GPS		Switch
HOLD		Annunciator
AUTO		Annunciator
GPS Sequence		Switch
Approach	Actv	Annunciator (not required for A2)
Approach	Arm	Annunciator (not required for A2)
GPS Approach		Switch (not required for A2)
Message		Annunciator
Arrival		Annunciator

The installer is advised to ensure that the switches and annunciators are the functional equivalent to and perform at least as well as the GARMIN devices used in the initial STC. The GARMIN switches and annunciators are sunlight readable and in the primary view of the pilot. Figure 2-3 shows what the GARMIN switch/annunciators look like. For other information concerning switch/annunciators see the Generic Airplane Flight Manual Supplement (190-00067-04) as well as current FAA directives.

Qualified GPS Antenna

This antenna must be one of those listed in the accessories list.

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2.6EXTERNAL ALTITUDE INPUT

Pressure altitude input from an external source may be derived from a RS-232 compatible serial altitude input or Parallel Gray Code/Gillham Altitude as described in Section 4 of this manual. Gillham Altitude is not required when serial altitude is used.

SECTION 3 INSTALLATION PROCEDURE

3.1INSTALLATION ACCESSORIES

The following installation accessories are available:

ANTENNA AND RACK OPTIONS
010-10040-01		GA 56 ANTENNA KIT, W/O CABLE (Mod 1, or later)
Includes:	011-00134-00		GA56 ANTENNA SUB-ASSEMBLY		1
	115-00031-00		BACKING PLATE		1
	210-10004-09		NUT, SELF-LOCKING, #8-32		4
	253-00002-00		ANTENNA GASKET		1
010-10040-02		GA 56 FLANGE MOUNT ANTENNA (Mod 1, or later)
Includes:	011-00147-00		FLANGE MOUNT GA56 ANTENNA SUB-ASSEMBLY		1
	115-00080-00		NUT PLATE		1
	211-62212-14 SCREW, #10-32 X 5/8				4
	253-00011-00		ANTENNA GASKET		1
320-00003-00		15 FT LOW-LOSS AVIATION ANT. EXTENSION CABLE WITH RIGHT ANGLE BNC CONNECTOR
320-00003-02		30 FT LOW-LOSS AVIATION ANT. EXTENSION CABLE WITH RIGHT ANGLE BNC CONNECTOR
330-00087-00		CONNECTOR, BNC, MALE, CLAMP
	Note: One cable		assembly and one BNC connector are required to make the		antenna cable, or it can
		be fabricated by the installer from materials meeting the requirements of paragraph 2.3.
011-00154-00		MOUNTING RACK, (WITHOUT CONNECTORS)
	Note: A mounting rack is required for approved installations. The following hardware is required for installa-
		tion of the mounting rack, but is not provided:
	#6-32 Flat Head Screw (4 ea.) #6-32 Self-locking Nut (4 ea.)
011-00313-00		CONNECTOR, (J1 and J2) Kit
DATA BASE OPTIONS
010-10051-00		MEMORY CARD - WORLDWIDE DATABASE
010-10051-01		MEMORY CARD - AMERICAS DATABASE
010-10051-02		MEMORY CARD - INTERNATIONAL DATABASE
010-10032-03		MEMORY CARD - USER
ANNUNCIATOR OPTIONS
GPN		MID-CONTINENT P/N		DESCRIPTION
013-00029-10		MD41-448		INTEGRATED SW/ANN UNIT, HOR, 28V
013-00029-11		MD41-444		INTEGRATED SW/ANN UNIT, HOR, 14V
013-00029-12		MD41-448 (5V)		INTEGRATED SW/ANN UNIT, HOR, 28V (5V LIGHTING)
013-00029-15		MD41-458		INTEGRATED SW/ANN UNIT, VERT, 28V
013-00029-16		MD41-454		INTEGRATED SW/ANN UNIT, VERT, 14V
013-00029-17		MD41-458 (5V)		INTEGRATED SW/ANN UNIT, VERT, 28V (5V LIGHTING)
MISCELLANEOUS OPTIONS
010-10075-00		PC KIT
190-00067-00		GNC 300 PILOT'S GUIDE
190-00067-01		GNC 300 QUICK REFERENCE GUIDE
190-00067-06		GNC 300 IN MOONEY M20J DOCUMENTED INSTALLATION
330-00067-00		GPS 1.57542 GHZ NOTCH FILTER
362-00014-00		WALL ADAPTER - 110/220VAC
010-10057-00		28 TO 14V CONVERTER (Consists of 011-00181-00)
010-10074-00		REMOTE BATTERY PACK (Consists of 011-00182-00)

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The following installation accessories are required but not provided:

COMM ANTENNA: BROAD BAND 50 OHM VERTICALLY POLARIZED WITH COAXIAL CABLE.

HEADPHONES:	500 OHM NOMINAL IMPEDANCE
MICROPHONE:	LOW IMPEDANCE CARBON OR DYNAMIC WITH TRANSISTORIZED PRE-AMP.

3.2ANTENNA INSTALLATION

For the COMM antenna, follow the manufacturers instructions.

The remainder of this section applies to the GPS antenna. The GA 56 Antenna outline and footprint dimensions are shown in Figures 3-1 and 3-2.

A.Using the backing plate as a template, mark the location of the mounting holes and the through hole for coax cable. Drill or punch the holes.

B.The antenna installation must provide adequate support for the antenna considering a maximum drag load of 5 lbs. for the GA 56 antennas (at subsonic speed). Install a doubler plate to reinforce thin skinned aircraft. Observe guidelines for acceptable installation practices as outlined in AC 43.13-2A.

C.Seal the antenna and gasket to the fuselage using a good quality electrical grade sealant. Use caution to insure that the antenna connector is not contaminated with sealant. Insure that the mounting screws are fully tightened and that the antenna base is well seated against the gasket. CAUTION: Do not use construction grade RTV sealant or sealants containing acetic acid. These sealants may damage the electrical connections to the antenna. Use of these type sealants may void the antenna warranty.

3.3CABLE INSTALLATION

A.Route the coax cable to the rack location keeping in mind the recommendations of Section 2. Secure the cable in accordance with good aviation practice.

B.Trim the coaxial cable to the desired length and install the BNC connector (330- 00087-00) per the cabling instructions on Figure 3-3. If the connector is provided by the installer, follow the connector manufacturer's instructions for cable preparation.

C.Contacts for the 37 and 26 pin connectors must be crimped into the individual wires of the aircraft wiring harness. The following tables list contact part numbers (for reference) and recommended crimp tools:

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Contacts

Standard Density Connectors

Hi Dens. Connector

37 socket connector (J1 on unit)

9 pin connector (on battery pack)

26 pin connector (J2 on unit)

20-24 AWG socket contact

18 AWG socket contact

20-24 AWG pin contact

18 AWG pin contact

22-28 AWG pin contact

Garmin p/n

336-00022-00

336-00023-00

336-00024-00

336-00025-00

336-00021-00

military p/n

M39029/63-368

n/a

M39029/64-369

n/a

M39029/58-360

Amp

205090-1

n/a

205089-1

n/a

204370-2

Positronic

M39029/63-368

FC6018D

M39029/64-369

MC6018D

M39029/58-360

ITTCannon

031-1007-042

see note

330-5291-037

see note

030-2042-000

Tools

Hand

Standard Density Connectors (size 20 contacts)

Hi Dens. Connector (size 22D)

Crimping

pin or socket contacts (20-24 AWG)

pin or socket contacts (18 AWG)

pin contacts (22-28 AWG)

Tool

positioner

insert/extract

positioner

insert/extract

positioner

insert/extract

military p/n

M22520/2-01

M22520/2-08

M81969/1-02

n/a

M81969/1-02

M22520/2-09

M81969/1-04

Positronic

9507

9502-5

M81969/1-02

9502-11

M81969/1-02

9502-3

M81969/1-04

ITTCannon

995-0001-584

995-0001-604

980-2000-426*

see note

274-7048-000*

995-0001-739

n/a

Amp

601966-1

601966-5

91067-2

n/a

601966-6

91067-1

Daniels

AFM8

K13-1

M24308/1-02

K774

M24308/1-02

K42

M24308/18-1

Astro

615717

615725

M81969/1-02

see note

M81969/1-02

615724

M81969/1-04

* Insert/extract tools from ITT Cannon are all plastic, others are plastic with metal tip.

NonGARMIN part numbers shown are not maintained by GARMIN and consequently are subject to change without notice.

NOTE: Alternate contacts for 18 AWG wire: As an alternate to the Positronic contacts listed (and provided in the install kit), the installer may use contacts made by ITT Cannon as follows: Socket contact - ITT Cannon p/n: 031-10007- 001, Pin contact - ITT Cannon p/n: 330-5291-055. These contacts require the use of a different crimp tool positioner than that shown in the table, with part numbers as follows: Daniels p/n: K250, Astro p/n: 616245, or ITT Cannon p/ n: 980-00005-722.

See Appendix B for information regarding obsolete stamped type contacts.

3.4RACK INSTALLATION

A.Figure 3-4 shows outline dimensions for the aviation rack. Install the rack in a rectangular 6.320" x 2.000" hole in the instrument panel. Exercise caution when installing the rack into the instrument panel. The rack is designed to facilitate removal of the GNC 300 for portable use. Deformation of the rack may make it difficult to install and remove the GNC 300.

B.Install the rack in the aircraft panel using four #6-32 countersunk screws and four self-locking nuts or other FAA approved methods as per Advisory Circular 43.13-1A. The screws are inserted from the inside through the holes in the sides of the rack (see Figure 3-5).

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