ILS LOCALIZER FAILURE
(See NATOPS, Chapter 21) Loss of the localizer signal is indicated by the appearance of the
LOCALIZER advisory window displayed on all MFDs, and localizer and glideslope needles on the ADI
and the HUD are removed. If ILS steering is selected, the inner portion of the CDI is also removed. With
a localizer failure (Figure 58), you will have to discontinue the approach or fly another type approach. If
both the glideslope and localizer signals are lost, the ILS advisory window is displayed and both localizer
and glideslope needles are removed from the ADI display and HUD.
Figure 58: FAILED ILS LOCALIZER
ILS MARKER BEACON FAILURE
If you lose ILS marker beacon indications, you may still be able to complete your approach if you can use
TACAN/DME, radar, or TACAN crossing radials to determine marker beacon positions. You may have to
adjust your approach minimums when you lose marker beacon indications.
FLIGHT WITH PARTIAL PANEL
See Basic Instrument Maneuvers section of this FTI for further information.