Garmin GNS 480 Installation Manaul

Also see for Apollo CNX80: User Newsletter User Newsletter Supplemental Flight manual Pilot's guide Data list

Contents

Installation ProceduresGNS 480 (CNX80) Installation Manual 560-0982-01 Rev L 2-32.5.1.2 IFR VOR/LOC/GS InstallationThe minimum GNS 480 installation requires the following items for an IFR VOR/LOC/GS Installation:• GNS 480 GPS/WAAS/NAV/COM (installed in the aircraft manufacturer approved location)• GPS antenna, NAV antenna and COM antenna.• External CDI/HSI indicator installed in the pilot’s primary field-of-view (or in the aircraftmanufacturer approved mounting location). This indicator must meet the following criteria:1. The course deviation needle shall have a full-scale deflection with a 150 mV deviation input.2. The valid flag shall be either a low-level input or superflag input.3. The TO/FROM flag shall be fully in view with a 250 mV input.4. The OBS resolver should be compatible with a standard 6-wire OBS interface:H ............ Reference output high E ......... S3 COS input lowC............. Reference output low F.......... S4 SIN input highD ............ S1 COS input high G ......... S2 SIN input lowAny electrical zero crossing will work because the GNS 480 will calibrate out any errors.• External non-numeric glideslope indicator installed in the pilot’s primary field-of-view. This indicatormust meet the following criteria:1. The glideslope deviation needle shall have a full-scale deflection with a 150 mV deviation input.2. The valid flag shall be either a low-level input or superflag input.NOTEExact specifications for the external CDI/HSI and glideslope indicator interfaces arefound in 1.3.9 Avionics Interfaces.• CDI/HSI source selection annunciator (only required for some installations – refer to 2.5.3.2 foradditional information describing when a source selection annunciator is required).• To take full advantage of the GNS 480 capabilities an optional altitude source is recommended forautomatic sequencing of course-to-altitude (CA) and heading-to-altitude (VA) leg types. If noaltitude data is provided to the GNS 480, CA and VA legs must be manually sequenced.2.5.1.3 IFR GPS InstallationIn order for the GNS 480 to be utilized for IFR GPS Navigation, the criteria in 2.5.1.2 must be met andthe GNS 480 must be mounted within the acceptable field-of-view. Refer to 2.5.3.1 for determiningwhether or not the GNS 480 is located within the acceptable field-of-view.In certain instances, aircraft on the Approved Model List have a center radio stack located outside of theacceptable field-of-view. These installations may only be approved for IFR operations under the AML if thelocation has been previously approved by the FAA (ACO). Refer to Appendix E for a list of aircraft that donot meet the acceptable field-of-view requirement above but have been evaluated by the FAA anddetermined to be acceptable.NOTEIf the GNS 480 installation is outside the acceptable field-of-view and the aircraft type isnot listed in Appendix E it does not mean that the installation is unacceptable – the FAAhas not yet evaluated it. The installation can be completed and the aircraft returned toservice pending an FAA evaluation of the installation, provided it is placarded “GPSLIMITED TO VFR USE ONLY” in clear view of the pilot. IFR VOR/LOC/GSoperations are still permitted in this instance.Contact Garmin AT for guidance on how to proceed in this case.