Garmin SA01933LA_D Manuál s instrukcemi stáhnout pdf (Strana 16)

Instructions for Continued Airworthiness G600, GNS 530W, GNS 430W, 190-01080-05 Rev. 2

GMA 347, GTX 330D, GMX 200, WSI AV-200 Cessna 208/208B Page 16 of 29

If the GRS 77 is replaced with a new, repaired, or exchange unit, then software must be loaded per

Section 4 of the appropriate Modification Summary. Reference Table 2-1 to determine whether re-

calibration is required.

GRS 77 Configuration Module is Replaced

If the GRS 77 Configuration Module is replaced, the GRS 77 must be re-calibrated. Reference Table

2-1.

2.7.2.3 Return to Service

After removing and reinstalling the GRS 77, the following return-to-service checks should be performed.

1. Power up the G600 system with the GDU 620 in normal mode.

2. Verify that the GDU displays valid heading and attitude within approximately one minute.

NOTE

The Heading can remain invalid if the magnetometer is near a large metal structure such as a hangar

wall or if the magnetometer is close to a large ground power cart.

3. Verify that no unexpected alerts are present. If alerts are present, troubleshoot using Appendix A

of the appropriate Modification Summary.

Table 2-1. GRS 77 Calibration Criteria

Condition

Calibrations Required

GRS 77

Pitch/Roll

Offset

See Section 4 of

Modification

Summary

GRS/GMU

Magnetic

Calibration

See Section 4 of

Modification

Summary

Engine Run-up

Vibration

Test

See Section 4 of

Modification

Summary

GRS 77 AHRS was removed and/or

replaced. The mounting tray was NOT

removed and the mounting tray bolts

were NOT loosened.

None Required.

GRS 77 AHRS was removed and/or

replaced. The mounting tray WAS

removed and/or mounting tray bolts

WERE loosened.

GRS 77 AHRS Configuration Module

was replaced.

X X X

2.7.3 GMU 44

2.7.3.1 Removal

1. Gain access to the GMU 44 magnetometer (see General Arrangement Drawing for location).

2. Unscrew the three screws that hold the GMU 44 to its mounting rack.

3. Carefully lift the GMU 44 from the rack.

4. Disconnect the wiring harness.

2.7.3.2 Installation

1. Visually inspect the connectors to ensure there are no bent or damaged pins. Repair any

damage.

2. Connect the wiring harness to the GMU 44.

3. Lower the GMU 44 into the rack and secure the plate with the three Phillips screws.

Original GMU 44 is Reinstalled

If the original GMU 44 was reinstalled, then software loading is not required. This does not include

units that were returned for repair as their software and configuration files are deleted during the

repair testing process. Recalibration is only required if the mount for the magnetometer was

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