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ZDV controller experiences vscs 'lockout.' controller utilizes backup vears equipment until vscs problem clears.
| Attributes | |
| ACN | 428622 |
| Time | |
| Date | 199902 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zdv.artcc |
| State Reference | CO |
| Environment | |
| Light | Daylight |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 |
| ASRS Report | 428622 |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | none taken : unable |
| Consequence | other |
| Supplementary | |
| Problem Areas | FAA |
| Primary Problem | FAA |
| Situations | |
| ATC Facility | communication equipment : zdv.artcc |
Narrative:
While working sector 6 at ZDV, we experienced an uncommanded, unexpected complete 'lockout' of the ability to transmit on all normal ground-to-air frequencys associated with vscs. Ground-to-ground communications and the ability to receive air-to-ground xmissions remained intact. We had to revert to emergency back-up communications separate from vscs (vears). A time period later, communications mysteriously returned to normal. A special event then occurred on sector 11. It had also happened to me earlier on sector 12 and to others earlier in the week at these position.
Original NASA ASRS Text
Title: ZDV CTLR EXPERIENCES VSCS 'LOCKOUT.' CTLR UTILIZES BACKUP VEARS EQUIP UNTIL VSCS PROB CLRS.
Narrative: WHILE WORKING SECTOR 6 AT ZDV, WE EXPERIENCED AN UNCOMMANDED, UNEXPECTED COMPLETE 'LOCKOUT' OF THE ABILITY TO XMIT ON ALL NORMAL GND-TO-AIR FREQS ASSOCIATED WITH VSCS. GND-TO-GND COMS AND THE ABILITY TO RECEIVE AIR-TO-GND XMISSIONS REMAINED INTACT. WE HAD TO REVERT TO EMER BACK-UP COMS SEPARATE FROM VSCS (VEARS). A TIME PERIOD LATER, COMS MYSTERIOUSLY RETURNED TO NORMAL. A SPECIAL EVENT THEN OCCURRED ON SECTOR 11. IT HAD ALSO HAPPENED TO ME EARLIER ON SECTOR 12 AND TO OTHERS EARLIER IN THE WK AT THESE POS.
Data retrieved from NASA's ASRS site as of July 2007 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.