Airliner 99
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach; Flight Crew Returned To Departure Airport
Aircraft
While executing the ILS approach I noticed that the glideslope on my HSI was not responding or 'coming alive' like it should be for that segment of the approach. I tapped on the instrument and realized that it was stuck as the glideslope would move and stick in a new position. At this time I advised ATC that I was going missed and began executing the missed approach. My intention was to shoot the approach again using my NAV 2 but by that time the visibility had dropped below minimums so I diverted.
Beechcraft C99 Captain reported the HSI glide slope indicator malfunctioned.