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ZTL controller concerned with frequency interference on 121 pt 35 by another, reported similar frequency at another location. Controller states this is a recurrent problem.
| Attributes | |
| ACN | 459815 |
| Time | |
| Date | 200001 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : atl.vortac |
| State Reference | GA |
| Altitude | msl bound lower : 11000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar pilot : private |
| Experience | controller radar : 18.4 controller time certified in position1 : 18.4 flight time total : 350 |
| ASRS Report | 459815 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Navigational Facility ATC Human Performance |
| Primary Problem | Navigational Facility |
| Situations | |
| ATC Facility | communication equipment : ztl.artcc |
Narrative:
After the 5TH time at transmitting and someone telling me I was blocked, the pilots finally advised me that another frequency was bleeding through and blocking me. I was operating on 121.35. I understand this has been an ongoing problem with no resolution to date. This bleed-over is going to cause a deviation and possibly an accident if not corrected, as this sector is very busy and complex with 98% of the airplanes either descending or climbing.
Original NASA ASRS Text
Title: ZTL CTLR CONCERNED WITH FREQ INTERFERENCE ON 121 PT 35 BY ANOTHER, RPTED SIMILAR FREQ AT ANOTHER LOCATION. CTLR STATES THIS IS A RECURRENT PROB.
Narrative: AFTER THE 5TH TIME AT XMITTING AND SOMEONE TELLING ME I WAS BLOCKED, THE PLTS FINALLY ADVISED ME THAT ANOTHER FREQ WAS BLEEDING THROUGH AND BLOCKING ME. I WAS OPERATING ON 121.35. I UNDERSTAND THIS HAS BEEN AN ONGOING PROB WITH NO RESOLUTION TO DATE. THIS BLEED-OVER IS GOING TO CAUSE A DEV AND POSSIBLY AN ACCIDENT IF NOT CORRECTED, AS THIS SECTOR IS VERY BUSY AND COMPLEX WITH 98% OF THE AIRPLANES EITHER DSNDING OR CLBING.
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.