GRS 77/GMU 44 Installation Manual
Page 3-5
190-00303-10
Revision L
Possible causes for a failure of this check include the following:
a)
The rack is fastened down to a surface that is not sufficiently flat
b)
The rack is warped or damaged
c)
The GRS 77 has a center baseplate external shim that is damaged or has been removed
d)
The GRS 77 baseplate has been warped or damaged
In the event of a failed test (gap on unfastened end of unit not within the range of 0.010 inch to 0.070
inch), these possibilities must be examined, and any deficiencies corrected to pass this check before the
installation is acceptable.
MEASURE GAP
MEASURE GAP
AT UNFASTENED END
AT UNFASTENED END
Figure 3-1. Measuring GRS 77 to Mounting Rack with Feeler Gauge
3.7
Post Installation Inspection
After the installation is complete, refer to Section 5 for system configuration, calibration and checkout.
NOTE
The GRS 77 AHRS will not provide valid outputs until the post
installation calibration procedures are completed.
