During an instrument approach, if the localizer appears to fail on the pilot's side of the cockpit, what action is recommended?

• A. Continue the approach using the failed nav guidance
• B. Initiate a go-around and reconfigure the nav guidance to read from the other side
• C. Land immediately if able
• D. Consult maintenance after landing

Answer: (B)

When an instrument approach suffers a nav failure, the priority is to maintain reliable guidance through redundancy. If the localizer signal is failing on the pilot’s side, you should not rely on that degraded source. The proper action is to initiate a go-around and reconfigure the nav system to read from the other side, using the opposite localizer receiver. This switch restores confident course guidance and lets you re-intercept the approach safely. If the other side provides stable guidance, you can continue the approach with that source; if not, you’ll execute the missed approach and reassess. Continuing with the failed nav or landing immediately without a usable alternative would be unsafe because you no longer have trustworthy guidance on that approach path. Consulting maintenance after landing doesn’t address the immediate risk during the approach.