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.

Av. Kit Install. Manual

190-00067-02 Rev. J

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