What should you do if the glideslope fails during an ILS approach?

When the glideslope fails during an Instrument Landing System (ILS) approach, the appropriate action is to use the localizer minimums. The localizer provides the lateral guidance necessary to maintain the correct approach path towards the runway, while the glideslope typically offers vertical guidance.

If the glideslope is inoperative, you can still rely on the localizer to continue the approach, though it will be a non-precision approach in terms of vertical guidance. At this point, the approach should be conducted at the localizer minimums, which are a set of minimum altitude requirements outlined in the approach plate. These minimums ensure that you maintain safe terrain clearance while transitioning to landing.

Continuing the approach visually can be an option only if the weather conditions allow for visual references, and it assumes that the pilot is transitioning from instrument to visual flight, which might not be the safest or most compliant choice without assurance of visual conditions.

Switching to a different ILS frequency would not resolve the glideslope failure, as the issue pertains to the signal reception or equipment failure. Attempting to reset the glideslope is not a practical action during an approach, given that pilots do not have the capability to correct such failures in-flight and must