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Cpr X uncoord climb through occupied altitude had less than standard separation from cpr Y. System error.
| Attributes | |
| ACN | 246327 |
| Time | |
| Date | 199307 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sug |
| State Reference | NC |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl tracon : avl |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 19 controller supervisory : 2 |
| ASRS Report | 246327 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
I was working east and west radar position combined in asheville approach control. Runway 34 was in use. Cpr X had departed avl, climbed sebound for irq VOR, had been handed off to shine sector of ZTL, changed to shine frequency, and had leveled at 10000 ft. (Departure procedures by LOA: departures requesting higher than 12000 ft are leveled at 10000 ft and changed to ZTL after handoff, and atlanta then climbs the aircraft.) cpr Y, inbound to gsp, was descending sbound to 11000 ft. Had been handed off to me by shine sector, and switched to my frequency. Cpr X was indicating about 230 KTS and cpr Y was indicating about 400 KTS as I recall from my ARTS iia scope, cpr Y still north of cpr X and overtaking him. Since I was not sure when shine would climb cpr X and since the aircraft had closed to less than 8 NM separation, I did not descend cpr Y. I advised cpr Y of the traffic and explained that the traffic was the reason for the delay in his descent. Cpr Y reported cpr X in sight. I attempted to coordinate with shine sector to turn cpr Y in shine's airspace to increase separation for descent, or to find out if I could use visual separation from his traffic, but the coordination line was not answered. I then noticed cpr X climb rapidly through cpr Y altitude, about a mi lateral separation. I am not sure what separation ZTL was using -- I do not believe they can use visual -- of why coordination was not accomplished. Fortunately my aircraft, cpr Y had cpr X in sight. Good coordination is essential to resolve sits such as this one. I realize that ZTL can be quite busy with clt traffic, but we must be able to coordinate these other sits also.
Original NASA ASRS Text
Title: CPR X UNCOORD CLB THROUGH OCCUPIED ALT HAD LTSS FROM CPR Y. SYS ERROR.
Narrative: I WAS WORKING E AND W RADAR POS COMBINED IN ASHEVILLE APCH CTL. RWY 34 WAS IN USE. CPR X HAD DEPARTED AVL, CLBED SEBOUND FOR IRQ VOR, HAD BEEN HANDED OFF TO SHINE SECTOR OF ZTL, CHANGED TO SHINE FREQ, AND HAD LEVELED AT 10000 FT. (DEP PROCS BY LOA: DEPS REQUESTING HIGHER THAN 12000 FT ARE LEVELED AT 10000 FT AND CHANGED TO ZTL AFTER HDOF, AND ATLANTA THEN CLBS THE ACFT.) CPR Y, INBOUND TO GSP, WAS DSNDING SBOUND TO 11000 FT. HAD BEEN HANDED OFF TO ME BY SHINE SECTOR, AND SWITCHED TO MY FREQ. CPR X WAS INDICATING ABOUT 230 KTS AND CPR Y WAS INDICATING ABOUT 400 KTS AS I RECALL FROM MY ARTS IIA SCOPE, CPR Y STILL N OF CPR X AND OVERTAKING HIM. SINCE I WAS NOT SURE WHEN SHINE WOULD CLB CPR X AND SINCE THE ACFT HAD CLOSED TO LESS THAN 8 NM SEPARATION, I DID NOT DSND CPR Y. I ADVISED CPR Y OF THE TFC AND EXPLAINED THAT THE TFC WAS THE REASON FOR THE DELAY IN HIS DSCNT. CPR Y RPTED CPR X IN SIGHT. I ATTEMPTED TO COORDINATE WITH SHINE SECTOR TO TURN CPR Y IN SHINE'S AIRSPACE TO INCREASE SEPARATION FOR DSCNT, OR TO FIND OUT IF I COULD USE VISUAL SEPARATION FROM HIS TFC, BUT THE COORD LINE WAS NOT ANSWERED. I THEN NOTICED CPR X CLB RAPIDLY THROUGH CPR Y ALT, ABOUT A MI LATERAL SEPARATION. I AM NOT SURE WHAT SEPARATION ZTL WAS USING -- I DO NOT BELIEVE THEY CAN USE VISUAL -- OF WHY COORD WAS NOT ACCOMPLISHED. FORTUNATELY MY ACFT, CPR Y HAD CPR X IN SIGHT. GOOD COORD IS ESSENTIAL TO RESOLVE SITS SUCH AS THIS ONE. I REALIZE THAT ZTL CAN BE QUITE BUSY WITH CLT TFC, BUT WE MUST BE ABLE TO COORDINATE THESE OTHER SITS ALSO.
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.