What can you do after passing the FAF if transitioning from LPV to LNAV?

After passing the Final Approach Fix (FAF) while transitioning from a Localizer Performance with Vertical guidance (LPV) to a Localizer Navigation (LNAV) approach, it is permissible to continue the approach, but with modified minimums.

This situation arises because LPV approaches offer vertical guidance and lower minimums due to their precision, whereas LNAV approaches are more akin to traditional lateral navigation without vertical guidance and typically have higher minimums. If you've established that you are unable to maintain LPV service (for instance, due to a loss of GPS signal or an indication that the system is not working correctly), you can still complete the approach but must reassess the minimums required for LNAV approaches.

Maintaining awareness of the aircraft’s current phase of flight and the conditions leading to the transition is crucial. Following the transition from LPV to LNAV, pilots must adjust to the higher decision altitude and ensure that they continue their descent while adhering to these new minimums all the way until the missed approach point, or until a safe landing can be achieved.

This consideration helps maintain safety and compliance with regulations concerning instrument approaches.