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An aircraft flew across the final approach course it was supposed to intercept and was involved in a loss of separation with traffic on the parallel final approach course. At some time during this event an aircraft also descended below minimum vectoring altitudes. During these events there were radio transmitter outages in this area which contributed and possibly caused the situations to occur. Certain frequencies are out of service and another has gone out of service routinely the past year.
| Attributes | |
| ACN | 1314074 |
| Time | |
| Date | 201512 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | A380 |
| Operating Under FAR Part | Part 129 |
| Flight Phase | Descent |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Descent |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Supervisor / CIC |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 4.5 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy |
Narrative:
Frequency issues in los angeles arrival area have been deteriorating for some time. 124.05 has been in and out of service over the past year many times. 124.5E main and standby transmitter and receiver are logged out of service. 124.9; the main frequency is out of service until the radios are moved at the airport. The rapid deployment voice switch (rdvs) bypass switch is still on 124.9. If the touch entry device (ted) goes out; 124.9 is what we are supposed to use; however no airplanes will be on that frequency. 132.37 main transmitter went out unexpectedly at some point during the error that occurred this evening. There was a loss of separation with a super and a terrain violation. Also; subsequent arrivals were disoriented and were vectored by other controllers because of the unexpected outage. I walked over when I heard the controller say he 'went through' with aircraft Y. The controller was trying 121.5. I pushed the standby transmitter button and he was able to communicate with the pilot again. The following morning; I came in for my day shift and 132.37 standby transmitter was temporarily out. The controller did an excellent job of separating his planes from the runaway aircraft Y. It could have been much worse. Need reliable frequencies and backups.
Original NASA ASRS Text
Title: An aircraft flew across the final approach course it was supposed to intercept and was involved in a loss of separation with traffic on the parallel final approach course. At some time during this event an aircraft also descended below minimum vectoring altitudes. During these events there were radio transmitter outages in this area which contributed and possibly caused the situations to occur. Certain frequencies are out of service and another has gone out of service routinely the past year.
Narrative: Frequency issues in Los Angeles Arrival Area have been deteriorating for some time. 124.05 has been in and out of service over the past year many times. 124.5E Main and Standby transmitter and receiver are logged out of service. 124.9; the main frequency is out of service until the radios are moved at the airport. The Rapid Deployment Voice Switch (RDVS) bypass switch is still on 124.9. If the Touch Entry Device (TED) goes out; 124.9 is what we are supposed to use; however no airplanes will be on that frequency. 132.37 Main transmitter went out unexpectedly at some point during the error that occurred this evening. There was a loss of separation with a super and a terrain violation. Also; subsequent arrivals were disoriented and were vectored by other controllers because of the unexpected outage. I walked over when I heard the controller say he 'went through' with Aircraft Y. The controller was trying 121.5. I pushed the standby transmitter button and he was able to communicate with the pilot again. The following morning; I came in for my day shift and 132.37 Standby Transmitter was temporarily out. The controller did an excellent job of separating his planes from the runaway Aircraft Y. It could have been much worse. Need reliable frequencies and backups.
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.