Page 3-2
G1000 Nav III Line Maintenance Manual
Rev. L
190-00352-00
3.4
GRS 77/GMU 44
3.4.1
GRS 77
Removing:
1.
Disconnect backshell connector from unit.
2.
Loosen four screws holding the unit to the mounting rack (Do not loosen mounting rack bolts).
Installing:
1.
Inspect connector(s) for damaged pins.
2.
Fasten unit to mounting rack.
3.
Connect backshell assembly to unit.
4.
Proceed to Section 4.4.
3.4.2
GMU 44
Removing:
1.
Loosen three screws connecting the unit to the aircraft mounting plate.
2.
Disconnect cable.
Installing:
1.
Inspect connector for damaged pins.
2.
Connect cable and properly secure connector in a stationary fashion.
3.
Fasten unit to the aircraft mounting rack.
4.
Proceed to Section 4.4.
3.5
GDC 74A
Removing:
1.
Loosen two thumb screws that secure the unit to the mounting rack
2.
Disconnect backshell assembly and pitot-static plumbing from unit.
3.
Remove all Teflon tape or sealing compound. Take care not to allow Teflon tape or sealing
compound to fall inside unit.
Installing:
1.
Inspect connector(s) and pitot-static plumbing for damage.
2.
Install Teflon tape or sealing compound to pitot-static plumbing
3.
Connect backshell assembly and pitot-static plumbing to the unit.
4.
Tighten two thumb screws that secure the unit to the mounting rack.
5.
Proceed to Section 4.5.
3.6
GEA 71
Removing:
1.
Loosen the Phillips screw to unlock unit handle.
2.
Pull the GEA 71 lever up towards the top of the unit. This disengages the locking stud with the
dogleg slot.
Installing:
1.
Inspect connector(s) for damaged pins.
2.
Gently push unit into the rack to engage the connectors.
3.
Push the GEA 71 lever down towards the bottom of the unit, avoiding the use of excessive force..
4.
If lever fails to go down, adjust backplate while engaging unit.
5.
Lock the handle into the GEA 71 body and tighten the Phillips screw.
6.
Proceed to Section 4.6.
Summary of Contents for G1000 NAV III
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