DF 300 08 SMIS No MPG displayed

[Dsaltydog]

All of a sudden:

Shows Fuel Flow
Shows Fuel Remaining
But the last line on the Fuel Economy " V" is no longer registering MPG

Any ideas, nothing has changed.

[Moonlighter]

Presumably you have a GPS antenna puck on the network? This would normally be the data source selected for MPG - is that what you've had up to date? The only other option is pitot speed.

So two thoughts as to what may have happened:

1. For some reason, data source for speed has been lost, so check data sources and make sure GPS is set as the data source for speed.

2. Your GPS antenna may have failed. If you also have a MfD with an internal GoS antenna on the network, try setting it as the speed data source and see if that that fixes the issue - if it does, this will tell you that the GPS antenna puck, or its connection to the network, has failed.

Let us know how you go.

[Dsaltydog]

thank you! will peel back a bit and see if i can isolate, Puck is a stand alone for the system,