Originally Posted by
RTfelix07
Does anyone have information about why we choose GPS L on FMC on preflight procedure?
I don’t think it has a technical reason as the antenna are in the same place.
In the Western world we write from left to right and count from left to right (and top to bottom)
So the left engine is #1 and so is the GPS-L.
Afaik when the GPS drops out it’s the IRS-L that provides position until radio nav updating is selected.