 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
A80 controller described a near loss of separation event when atl tower local positions apparently mis coordinated transitioning to headings vs. RNAV procedures.
| Attributes | |
| ACN | 985615 |
| Time | |
| Date | 201112 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | A80.TRACON |
| State Reference | GA |
| Aircraft 1 | |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach Departure |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
Atl tower departed a DC10 off 26R and a B757 departed 27L. It was at the end of the day; and I believe the controller on local control 2 rolled the DC10 on an assigned heading; while the controller on local control 3 rolled the B757 on the SID. I was coordinating with the controller next to me when I noticed the two aircraft wingtip-to-wingtip and I turned my aircraft south. The local control 3 had called down and told me that was their last RNAV off the ground; and they were going to be issuing headings after that aircraft when the tower goes to heading for noise abatement at night; 15 degrees is ensured; when aircraft are on the RNAV departure; they're separated by divergence; in some cases reduced divergence per procedures/waivers at atl. They could've been on the RNAV departure on the north complex; but I don't believe they were. The resultant separation was less than standard. I turned my aircraft as soon as it occurred to me there may have been a miscommunication in the tower. Procedures say we go to heading a lot earlier than atl normally does due to convenience and volume. If what it appeared happen did actually occur; this is a coordination problem in the tower and needs to be worked out.
Original NASA ASRS Text
Title: A80 Controller described a near loss of separation event when ATL Tower Local positions apparently mis coordinated transitioning to headings vs. RNAV procedures.
Narrative: ATL Tower departed a DC10 off 26R and a B757 departed 27L. It was at the end of the day; and I believe the Controller on Local Control 2 rolled the DC10 on an assigned heading; while the Controller on Local Control 3 rolled the B757 on the SID. I was coordinating with the Controller next to me when I noticed the two aircraft wingtip-to-wingtip and I turned my aircraft south. The Local Control 3 had called down and told me that was their last RNAV Off The Ground; and they were going to be issuing headings after that aircraft when the Tower goes to heading for noise abatement at night; 15 degrees is ensured; when aircraft are on the RNAV departure; they're separated by divergence; in some cases reduced divergence per procedures/waivers at ATL. They could've been on the RNAV departure on the North complex; but I don't believe they were. The resultant separation was less than standard. I turned my aircraft as soon as it occurred to me there may have been a miscommunication in the Tower. Procedures say we go to heading a lot earlier than ATL normally does due to convenience and volume. If what it appeared happen did actually occur; this is a coordination problem in the Tower and needs to be worked out.
Data retrieved from NASA's ASRS site as of April 2012 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.