Narrative:

Aircraft X; was on a base for the ILS runway 12 at bzn. There were 4 other aircraft being vectored for the ILS at the time. The bzn sector utilizes three radar feeds (qsi; bzn; qva) and is fused. An error message appeared in the stars status area that both qsi and bzn radars had failed. In addition; all of the frequencies for the sector failed as well. There is no 121.5/243.0 available at this sector. As soon as I realized what had happened; I broadcast on the emergency backup frequency for 118.97 and issued aircraft X a vector to join the localizer even though I had lost radar on the target. The terrain rises north and east of the localizer and the MVA is 8300. Aircraft X was at 7600. I attempted several times to relay through other aircraft but all the frequencies had failed. I called bzn ATCT and the controller stated that aircraft X was on their frequency and was 30 seconds from joining the localizer. I asked bzn for a position from aircraft X and the tower stated 4 miles from manni and established on the localizer. I then cleared the aircraft for the ILS runway 12 approach.there was a known issue throughout the building with no internet for reports; no way to obtain NOTAMS or no indication that this issue may affect the radar feed at this sector. If known; I could have assigned non radar separation to all of the arrivals to ensure a loss of radar would have little effect except efficiency.

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Original NASA ASRS Text

Title: Boise TRACON Controller reported losing radio and radar contact on an aircraft inbound to an airport in mountainous terrain.

Narrative: Aircraft X; was on a base for the ILS Runway 12 at BZN. There were 4 other aircraft being vectored for the ILS at the time. The BZN sector utilizes three radar feeds (QSI; BZN; QVA) and is FUSED. An error message appeared in the STARS status area that both QSI and BZN radars had failed. In addition; all of the frequencies for the sector failed as well. There is NO 121.5/243.0 available at this sector. As soon as I realized what had happened; I broadcast on the emergency backup frequency for 118.97 and issued Aircraft X a vector to join the localizer even though I had lost radar on the target. The terrain rises north and east of the localizer and the MVA is 8300. Aircraft X was at 7600. I attempted several times to relay through other aircraft but all the frequencies had failed. I called BZN ATCT and the controller stated that Aircraft X was on their frequency and was 30 seconds from joining the localizer. I asked BZN for a position from Aircraft X and the tower stated 4 miles from MANNI and established on the localizer. I then cleared the aircraft for the ILS Runway 12 approach.There was a known issue throughout the building with no internet for reports; no way to obtain NOTAMS or no indication that this issue may affect the radar feed at this sector. If known; I could have assigned non radar separation to all of the arrivals to ensure a loss of radar would have little effect except efficiency.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.