Question

If LPV NOT AVAILABLE is displayed on the CDU, what can the pilot do?

a) Continue with the LPV approach
b) Switch to LNAV/VNAV approach
c) Initiate a missed approach
d) Disable the approach mode

Answer 1

If LPV NOT AVAILABLE is displayed on the CDU, the pilot should switch to the LNAV/VNAV approach instead of continuing with the LPV approach. Initiating a missed approach or disabling the approach mode may not be necessary if the alternative LNAV/VNAV approach is available.

Step-by-step explanation:

If the CDU displays LPV NOT AVAILABLE, the pilot should switch to the LNAV/VNAV approach. This is because LPV (Localizer Performance with Vertical Guidance) approach requires precise satellite-based navigation, while LNAV/VNAV (Lateral Navigation/Vertical Navigation) approach uses ground-based navigation aids, such as VOR or DME. By switching to LNAV/VNAV, the pilot can still navigate accurately and vertically descend towards the runway.

Initiating a missed approach or disabling the approach mode may not be necessary if the alternative LNAV/VNAV approach is available. Continuing with the LPV approach is not recommended as the LPV service is unavailable. The pilot should follow the instrument approach procedures provided by the air traffic control and switch to the appropriate approach mode when LPV NOT AVAILABLE is displayed.