What action is appropriate if an electronic glide slope malfunction occurs while making an ILS approach with VASI in sight?

In the scenario of an electronic glide slope malfunction while on an Instrument Landing System (ILS) approach, the correct action is to utilize the visual approach slope indicator (VASI) as a reference for maintaining the proper glideslope to the runway. The VASI provides visual guidance to ensure that the aircraft is on the correct flight path for landing. Pilots are trained to use all available resources, and if the electronic glide slope is inoperative but the VASI is functioning correctly, it can serve as a reliable means to maintain the correct descent profile visually.

It is essential for pilots to assess the situation during an approach and utilize any available visual aids to ensure a safe landing. The use of VASI allows the pilot to continue the approach safely without immediate need to abort or execute a missed approach, provided that they can confirm the visual descent path aligns with safe landing criteria. Thus, continuing the approach while adhering to the VASI guidelines is a practical response to the malfunction of the electronic glide slope.