1-EGPWS database check. 737-3/4/500
EGPWS database check:
-Radar selector to TEST
-Radar button ON (pedestal)
-push TERR button ON (forward panel)
-GroundProximityWarning Test press and hold
-wait and see your EHSI screen, there will be "TDB477" (Terrain Data Base 477)
might be good for the NG never tried only on the efis classics!