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Radar associate takes over position from radar controller and issues incorrect altitude to converging traffic resulting in a loss of separation.
| Attributes | |
| ACN | 603565 |
| Time | |
| Date | 200312 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 8 controller radar : 5 controller time certified in position1 : 1 controller time certified in position2 : 8 |
| ASRS Report | 603565 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar mode c other controllera other controllerb other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 9000 vertical : 1000 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was controller in charge (controller in charge). We had a busy session and traffic had decreased to 2-4 airplanes at the sector. I then told the controller they could one-person the sector. The controller on the d-side relieved the r-side. I proceeded to give a relief briefing for myself and the controller at the radar scope advised me that there was a loss of separation. I believe the cause of the problem to be -- the controller was looking at the altitude block of the traffic and read that altitude to the other aircraft when he meant to issue a different altitude.
Original NASA ASRS Text
Title: RADAR ASSOCIATE TAKES OVER POS FROM RADAR CTLR AND ISSUES INCORRECT ALT TO CONVERGING TFC RESULTING IN A LOSS OF SEPARATION.
Narrative: I WAS CIC (CTLR IN CHARGE). WE HAD A BUSY SESSION AND TFC HAD DECREASED TO 2-4 AIRPLANES AT THE SECTOR. I THEN TOLD THE CTLR THEY COULD ONE-PERSON THE SECTOR. THE CTLR ON THE D-SIDE RELIEVED THE R-SIDE. I PROCEEDED TO GIVE A RELIEF BRIEFING FOR MYSELF AND THE CTLR AT THE RADAR SCOPE ADVISED ME THAT THERE WAS A LOSS OF SEPARATION. I BELIEVE THE CAUSE OF THE PROB TO BE -- THE CTLR WAS LOOKING AT THE ALT BLOCK OF THE TFC AND READ THAT ALT TO THE OTHER ACFT WHEN HE MEANT TO ISSUE A DIFFERENT ALT.
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.