IFD500 Series Pilot Guide
System Overview 1-19
NOTE
Some Data May Be Delayed At Startup
Some data such as fuel flow and fuel totalizer may
experience a 5-10 second delay during post start
initialization. For those aircraft configured with fuel
totalizers, this may result in some fuel display
changes on the Fuel Mgmt page during that period
including prompting the pilot to enter in initial fuel.
That should resolve itself within a few seconds.
Another example concerns the FMS navigation
database initialization, where the message “Loading
nav database...” may be displayed on any of the
FMS tabs for 10-30 seconds. Additionally, if an
IFD550 or IFD545 unit has been exposed to extreme
cold prior to start, it may take a warm up period to
achieve standard performance.
TIPS AND TECHNIQUES
“GPS No Position” Message Possible at Startup
If the GPS takes an unusually long time (e.g. more
than 2 minutes) to acquire an initial position fix, the
“GPS No Position” advisory message will be
displayed. This message will automatically clear
itself when a position fix is acquired. If the message
does not remove itself by the time you are ready to
taxi, it is a clear indication that your system has not
determined its initial position and action may be
required on your part.
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