7.6.16 AHRS/IRU Interface Check
Verify the IFD5XX is receiving heading information from an external source. This can be
verified on the Main Input Page in maintenance mode, reference Section 7.5.5. If power is
removed from the external heading source, the Main Input Page will display dashed lines for
heading. Note: If the IFD5XX is connected to a Primary Flight Display, it must be turned off
before performing this check.
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IFD5XX Installation Manual
Revision: 02