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Kansas city controller reported radio problems in the area and then a loss of separation due to the radio failure.
| Attributes | |
| ACN | 1599677 |
| Time | |
| Date | 201812 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZKC.ARTCC |
| State Reference | KS |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 17.4 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
I was working and sector above me asked me to key their frequency because they believed that they lost frequency. I couldn't change their frequency. The controller in charge then asked if I had my frequency. I had tried to ship an aircraft prior but then tried another and no response. [Operations manager] then came down the aisle and said switch to vtabs [voice switching and control system training and backup switch]. I proceeded to plug into d-side position pre-jack. My frequency still wasn't working. I called ZME calico sector to try they to give my aircraft X. No luck reaching aircraft X. I then plugged into d-side headset jack and broadcast for aircraft X. I had never gotten a response but aircraft X started descending at 3 mins till loss of separation and 4 mins till impact. We were cpdlc testing at the time of the event. I needed a d-side but was unable to get help because I needed to communicate with aircraft and there was no position available to help me.
Original NASA ASRS Text
Title: Kansas City Controller reported radio problems in the area and then a loss of separation due to the radio failure.
Narrative: I was working and sector above me asked me to key their frequency because they believed that they lost frequency. I couldn't change their frequency. The CIC then asked if I had my frequency. I had tried to ship an aircraft prior but then tried another and no response. [Operations Manager] then came down the aisle and said switch to VTABS [Voice Switching and Control System Training and Backup Switch]. I proceeded to plug into D-side position PRE-jack. My frequency still wasn't working. I called ZME Calico sector to try they to give my Aircraft X. No luck reaching Aircraft X. I then plugged into D-side headset jack and broadcast for Aircraft X. I had never gotten a response but Aircraft X started descending at 3 mins till loss of separation and 4 mins till impact. We were CPDLC testing at the time of the event. I needed a D-side but was unable to get help because I needed to communicate with aircraft and there was no position available to help me.
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.