8 ms·
Hard to say what the actual procedure is. Might need a cold dark airplane for an hour for the GCU to clear memory or you might have to open panels and go back t
by bronco21016 8y ago
Hard to say what the actual procedure is. Might need a cold dark airplane for an hour for the GCU to clear memory or you might have to open panels and go back there and physically disconnect power to GCUs to get it done. It seems to me opening panels would probably take more than an hour.
- bdonlan 8y agoRealigning the IMUs would take something like 20 minutes alone (though it depends on the plane's current latitude).
- bronco21016 8y agoI’m currently working on an aircraft that has IMUs rather than AHRS/RNAV/GPS. I cannot recall ever seeing them take more than 5 minutes on first start up in the morning. Manuals specify 2.5-10 minutes. This is on a 1980s model. I’m sure newer designs are quicker.