Maintenance Intervals; Table 4-1 Periodic Maintenance - Garmin GTN Xi Series Maintenance Manual

4.3 Maintenance Intervals

Item
Equipment Removal
and Replacement
Cleaning the Front
Panel
Display Backlight
Battery
Replacement
Test - Bonding
Check
Test TVS Lightning
Protection
Test Lightning
Protection
190-01007-C1
Rev. 1

Table 4-1 Periodic Maintenance

Description/Procedure
Removal and replacement of the following items. Refer to
Section 6 of this document for instructions.
• GTN Xi, Flight Stream 210, Flight Stream 510, or GMA 35
• NAV antenna cable splitter
• NAV antenna cable diplexer
• Fan
The front bezel, keypad, and display can be cleaned with a soft
cotton cloth dampened with clean water. DO NOT use any
chemical cleaning agents. Care should be taken to avoid
scratching the surface of the display.
The display backlight LEDs are rated by the manufacturer as
having a usable life of at least 36,000 hours. This life may be
more or less than the rated time depending on the operating
conditions of the GTN Xi. Over time, the backlight may dim and
the display may not perform as well in direct sunlight conditions.
The user must determine by observation when the display
brightness is not suitable for its intended use. Contact the
Garmin factory repair station when the backlight requires
service.
The GTN Xi has an internal keep-alive battery that will last about
10 years. The battery is used for GPS system information.
Regular planned replacement is not necessary. The GTN Xi will
display a "low battery" message when replacement is required.
Once the low battery message is displayed, the battery should
be replaced within 1 to 2 months.
If the battery is not replaced and becomes totally discharged, the
GTN Xi will remain fully operational, but the GPS signal
acquisition time may be increased. There is no loss of function or
accuracy of the GTN Xi with a dead battery.
The battery must be replaced by the Garmin factory repair
station or factory authorized repair station.
Perform an electrical bonding check of the GTN Xi, GMA 35
(if installed), and Flight Stream 210 (if installed) per Section 4.5.
The GTN Xi #1 main power input has a TVS located at the LRU
for IFR non-metallic aircraft only. TVS1 and TVS2 must be
checked or replaced in accordance with Section 4.6.
The GTN Xi #1 main power input and NAV power input will have
a TVS located at the LRU for IFR non-metallic aircraft only.
TVS1 and TVS2 must be replaced in accordance with
Section 6.9.
GTN Xi Part 23 AML STC Maintenance Manual
Interval
On Condition
On Condition
On Condition
On Condition
Every 10
years or 2000
flight hours,
whichever
comes first
24 Calendar
Months
After a
suspected or
actual
lightning
strike
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