Grs 77; Gmu 44; Gdc 74A; Gea 71 - Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual

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6.5 GRS 77
To remove:
1. Disconnect Backshell connector from unit.
2. Loosen four screws holding the unit to the mounting rack (do not loosen mounting rack
bolts).
To install:
1. Inspect connector(s) for damaged pins.
2. Fasten unit to mounting rack.
3. Connect Backshell assembly to unit.
6.6 GMU 44
To remove:
1. Loosen three screws connecting the unit to the aircraft mounting plate.
2. Disconnect cable.
To install:
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.
6.7 GDC 74A
To remove:
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.
To install:
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 thumbscrews that secure the unit to the mounting rack.
6.8 GEA 71
To remove:
1. Loosen the Phillips screw to unlock unit handle.
2. Pull the GEA lever up towards the top of the unit. This disengages the locking stud with
the dogleg slot.
Cirrus Perspective™ Line Maintenance Manual
190-00920-00
Page 6-3
Rev. E