Garmin GDL 69 Instructions Manual

Also see for GDL 69: Pilot's guide addendum Pilot's guide addendum Activation Instructions Pilot's guide Activation Instructions

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Garmin GDL 69 Instructions Manual Manual pdf 6 page image

GDL 69/69A XM Satellite Radio 190-00355-00 Rev.EInstructions for Continued Airworthiness Page 6 of 8NOTEFailure of the GRC 10 (i.e. dead batteries) has no impact on normal aircraft operationsand is only used for passengers to control audio entertainment.2.5 Periodic Maintenance Instructions2.5.1 Annual InspectionOperation of the GDL 69/69A and GRT 10 / GRC 10 is not permitted unless an inspection as describedin this section has been completed within the preceding 12 calendar months. Conduct a visual inspectionon the unit and its wire harness to insure continued installation integrity:1. Inspect the unit for security of attachment.2. Inspect the condition of wiring, routing, and attachment/clamping.3. Verify the GDL 69/69A unit operation by viewing XM Satellite information on the control displayunit, or by checking the XM information or XM Status page on the control display unit. If GRT 10and GRC 10 are installed, verify GRT 10 and GRC 10 operation by viewing XM radio channelinformation on the GRC 10 display.In addition, GDL 69A installations which use audio suppression inputs, verify each audio suppressioninput for proper operation by the following step.4. Verify the GDL 69A audio to the crew headphones is muted when each warning alarm isactivated. The stall warning may be activated by raising the stall vane on the leading edge of thewing. The gear warning horn may be simulated by providing power or ground, as appropriate,directly to the horn; provided the horn has been tested for proper operation when a gearretraction test was performed.2.5.2 Electrical Bonding TestGDL 69 system electrical bonding must be tested every 2000 flight hours or ten (10) years, whichever isfirst. If measured resistance is greater than Required Bonding in the following table, bonding must beimproved to meet applicable requirements for a new installation in accordance with the GDL 69/69AInstallation Manual Reference sections listed. LRUs must be disconnected from interfaced cables duringthe measurements as detailed below. Reconnect LRUs after measurements and any required bondingimprovements are completed.LRU Required Bonding Installation Manual ReferenceGDL 69 10 milliohm 2.4.2XM antenna 10 milliohm 2.6.2The GDL 69 measurement is made with connectors disconnected from the GDL 69. To accomplish this,the backplate assembly with attached connectors can be removed from the GDL 69 mounting rack. Thebonding resistance is measured from the rack to airframe ground.During the XM antenna measurement, any coax normally attached to the antenna must be disconnected.Antenna bonding is measured from the XM connector (TNC external ground) on the antenna to a nearbyexposed portion of conductive aircraft structure (example: exposed rivet on fuselage stringer) or to theground plane for the antenna (such as the metallic ground plane added for non-metallic aircraft).

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