Garmin G1000 Line Maintenance Manual page 169

Uncontrolled if Printed
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3. Apply ground power to the aircraft. Energize the system and record the system
software level. This will be needed if assistance from Garmin Aviation Support is
required.
4. After the system has initialized (about one minute from applying power), note any
red X or system messages.
5. Try to verify the issue still exists before proceeding to the physical inspection
procedure below:
a) Turn off the system and gain access to the GRS.
b) Verify the GRS connector is tight and the locking slider is engaged to the
locking tabs on each side of the connector.
c) Ensure the wiring harness is not loose and able to move around during flight.
This condition could cause wires to pull on or vibrate the connector, causing
intermittent connections.
d) Ensure the GRS is mounted tight to the rack. If any doubt exists, use a
screwdriver to check the tightness of the mounting screws.
e) Check the area of the GRS for any heavy objects that might not be fastened
tight to the structure, which could induce GRS vibration.
f) Look for evidence of water or fluid contamination in the area around the GRS.
g) Unplug the GRS connector and check for bent pins.
h) Inspect the wiring harness clamp on the rear of the connector to verify it is not
too tight and damaging wires. Also check for some sort of protective wire wrap
between the wires and the clamp. If the wire clamp is installed upside down, it
has sharp edges that can cut into the wires.
i) Make sure the locking slider spring is strong enough to keep the slider in the
locked position by cycling the slider.
6. Ensure that no device is turned on in the aircraft cabin using cell phone or Wi-Fi
technology, even in a monitoring state.
7. Make sure metal objects (tool boxes, power carts, etc.) are not interfering with the
magnetometer; and the aircraft is not in a hangar, near other buildings, parked
over metal drainage culverts or on hard surfaces that might contain steel rein-
forcements.
8. Check for software or failed data path error messages. Correct any errors before
proceeding.
9. Make sure the GRS unit connector is secure and proper wiring harness strain
relief is provided.
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LMM for the Kodiak 100
190-02102-00 Rev.4
Page 4-85