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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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ARTCC radar controller turned a cpr HS25 to achieve separation with a cpr DA20 at the same altitude. The HS25 read back the wrong way to turn and the controller didn't hear the readback. The DA20 was climbed, but separation was lost. The sector was 'red' at the time and the data controller was too busy to help the radar controller.
| Attributes | |
| ACN | 386219 |
| Time | |
| Date | 199711 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fdy |
| State Reference | OH |
| Altitude | msl bound lower : 37000 msl bound upper : 38100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 1000 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 20FJF/20C/20D/20E/20F |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : radar |
| Experience | controller non radar : 3 controller radar : 12 |
| ASRS Report | 386219 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance non adherence : required legal separation other spatial deviation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 18600 vertical : 1100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Light transport X was nebound at FL370 direct jhw. Light transport Y was sebound at FL370 climbing to FL390. Light transport X was issued a 30 degree right. This would have separated the traffic. Light transport X read back 30 degrees left. I did not hear the readback due to the controller saying something else as well as collateral duties. It was very busy, very complex. The sector was red. I had about 15 strips in my hand plus more printing that I did not have time to stuff. The radar controller did not hear the readback either.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR TURNED A CPR HS25 TO ACHIEVE SEPARATION WITH A CPR DA20 AT THE SAME ALT. THE HS25 READ BACK THE WRONG WAY TO TURN AND THE CTLR DIDN'T HEAR THE READBACK. THE DA20 WAS CLBED, BUT SEPARATION WAS LOST. THE SECTOR WAS 'RED' AT THE TIME AND THE DATA CTLR WAS TOO BUSY TO HELP THE RADAR CTLR.
Narrative: LTT X WAS NEBOUND AT FL370 DIRECT JHW. LTT Y WAS SEBOUND AT FL370 CLBING TO FL390. LTT X WAS ISSUED A 30 DEG R. THIS WOULD HAVE SEPARATED THE TFC. LTT X READ BACK 30 DEGS L. I DID NOT HEAR THE READBACK DUE TO THE CTLR SAYING SOMETHING ELSE AS WELL AS COLLATERAL DUTIES. IT WAS VERY BUSY, VERY COMPLEX. THE SECTOR WAS RED. I HAD ABOUT 15 STRIPS IN MY HAND PLUS MORE PRINTING THAT I DID NOT HAVE TIME TO STUFF. THE RADAR CTLR DID NOT HEAR THE READBACK EITHER.
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.