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A80 controller described a conflict event when traffic assigned a RNAV arrival strayed off the assigned route; the controller indicating this was not an isolated occurrence.
| Attributes | |
| ACN | 1066511 |
| Time | |
| Date | 201302 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | A80.TRACON |
| State Reference | GA |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach Departure |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
A B747-400 came in from the northwest and I was told by tmu to assign runway 27L; but to keep him on the north downwind instead of the actual 27L transition that we use when in dual operations. I told the B747-400 to expect vectors to runway 27L and went on working the other traffic. Close behind the B747-400; there was another jet that I slowed to keep heavy separation. I noticed that the jet was compressing on the B747-400 to I turned the other jet 15 degrees to the right to keep separation. A few minutes later; I noticed the B747-400 turning on the 27L transition; right into the path of the other jet. I immediately turned B747-400 back the the left and descended him to 11;000 [feet] to try and keep separation. I'm really not sure what can be fixed here besides completely taking aircraft off the RNAV arrivals. I have had to do this a couple of times and I was able to explain to those pilots before what I needed them to do so they didn't plug the runway into their FMS's and fly the transition. Due to traffic complexity; I see this happening on occasion and I have concluded for myself; in order to stay safe and keep explanations to a minimum; I will just take them off the arrivals completely and put them direct atl or just on a vector.
Original NASA ASRS Text
Title: A80 Controller described a conflict event when traffic assigned a RNAV arrival strayed off the assigned route; the Controller indicating this was not an isolated occurrence.
Narrative: A B747-400 came in from the Northwest and I was told by TMU to assign Runway 27L; but to keep him on the north downwind instead of the actual 27L transition that we use when in dual operations. I told the B747-400 to expect vectors to Runway 27L and went on working the other traffic. Close behind the B747-400; there was another jet that I slowed to keep heavy separation. I noticed that the jet was compressing on the B747-400 to I turned the other jet 15 degrees to the right to keep separation. A few minutes later; I noticed the B747-400 turning on the 27L transition; right into the path of the other jet. I immediately turned B747-400 back the the left and descended him to 11;000 [feet] to try and keep separation. I'm really not sure what can be fixed here besides completely taking aircraft off the RNAV arrivals. I have had to do this a couple of times and I was able to explain to those pilots before what I needed them to do so they didn't plug the runway into their FMS's and fly the transition. Due to traffic complexity; I see this happening on occasion and I have concluded for myself; in order to stay safe and keep explanations to a minimum; I will just take them off the arrivals completely and put them direct ATL or just on a vector.
Data retrieved from NASA's ASRS site as of July 2013 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.