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Coordination problem between artccs during heavy traffic period causes airspace infringements and potential conflict.
| Attributes | |
| ACN | 181326 |
| Time | |
| Date | 199106 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sdz |
| State Reference | NC |
| Altitude | msl bound lower : 16000 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude descent other |
| Route In Use | enroute airway : ztl enroute airway : zjx enroute airway : zdc |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 6 controller radar : 4 |
| ASRS Report | 181326 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure other anomaly other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 36000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation Inter Facility Coordination Failure |
| Situations | |
| ATC Facility | other physical facility |
Narrative:
Large transport X (cae departure landing rdu) medium large transport Y (clt departure at 17000 landing oaj). Large transport X had mode C readout of 17000 with assigned altitude of FL210 in data block (letter of agreement altitude FL210). In handoff status to lib low sector (R27-ZDC) from flo low sector (J71-ZJX) I called ZJX with control instructions for large transport X to climb to FL180 due to converging course with medium large transport Y at 17000. After analyzing traffic again (large transport x-mlg Y) I called ZTL T30 sector in blind on voice line advising my intentions to descend medium large transport Y to 16000. I then issued clearance to medium large transport Y to 16000. I then noticed mode C on large transport X descending out of 17000. I then turned medium large transport Y heading 060 to roughly track northeast like large transport X. I then called ZJX again to find out what they were doing with large transport X. I told ZJX to leave aircraft at 16000 and I cleared medium large transport Y to 14000. This incident was causal factor in several airspace violations that occurred after incident (aircraft spilling into my sector without coordination or pointouts). This situation, in my opinion, was not only dangerous (near loss of separation) but also avoidable if better coordination was available between interfacilities (such as override capability) and if ZJX controller had climbed large transport X to FL180 as coordinated. Since incident occurred during busy arrival flow into rdu and clt departure flow to northeast traffic had to hold with very short notice so several aircraft violated my airspace before ZJX was able to turn aircraft back in their airspace. I was too busy to accept any additional handoffs so I could concentrate on providing separation and spacing on traffic I was already working, about 10-12 (4 or 5 arrs, rest overflts).
Original NASA ASRS Text
Title: COORD PROBLEM BTWN ARTCCS DURING HVY TFC PERIOD CAUSES AIRSPACE INFRINGEMENTS AND POTENTIAL CONFLICT.
Narrative: LGT X (CAE DEP LNDG RDU) MLG Y (CLT DEP AT 17000 LNDG OAJ). LGT X HAD MODE C READOUT OF 17000 WITH ASSIGNED ALT OF FL210 IN DATA BLOCK (LETTER OF AGREEMENT ALT FL210). IN HDOF STATUS TO LIB LOW SECTOR (R27-ZDC) FROM FLO LOW SECTOR (J71-ZJX) I CALLED ZJX WITH CTL INSTRUCTIONS FOR LGT X TO CLB TO FL180 DUE TO CONVERGING COURSE WITH MLG Y AT 17000. AFTER ANALYZING TFC AGAIN (LGT X-MLG Y) I CALLED ZTL T30 SECTOR IN BLIND ON VOICE LINE ADVISING MY INTENTIONS TO DSND MLG Y TO 16000. I THEN ISSUED CLRNC TO MLG Y TO 16000. I THEN NOTICED MODE C ON LGT X DSNDING OUT OF 17000. I THEN TURNED MLG Y HDG 060 TO ROUGHLY TRACK NE LIKE LGT X. I THEN CALLED ZJX AGAIN TO FIND OUT WHAT THEY WERE DOING WITH LGT X. I TOLD ZJX TO LEAVE ACFT AT 16000 AND I CLRED MLG Y TO 14000. THIS INCIDENT WAS CAUSAL FACTOR IN SEVERAL AIRSPACE VIOLATIONS THAT OCCURRED AFTER INCIDENT (ACFT SPILLING INTO MY SECTOR WITHOUT COORD OR POINTOUTS). THIS SITUATION, IN MY OPINION, WAS NOT ONLY DANGEROUS (NEAR LOSS OF SEPARATION) BUT ALSO AVOIDABLE IF BETTER COORD WAS AVAILABLE BTWN INTERFACILITIES (SUCH AS OVERRIDE CAPABILITY) AND IF ZJX CTLR HAD CLBED LGT X TO FL180 AS COORDINATED. SINCE INCIDENT OCCURRED DURING BUSY ARR FLOW INTO RDU AND CLT DEP FLOW TO NE TFC HAD TO HOLD WITH VERY SHORT NOTICE SO SEVERAL ACFT VIOLATED MY AIRSPACE BEFORE ZJX WAS ABLE TO TURN ACFT BACK IN THEIR AIRSPACE. I WAS TOO BUSY TO ACCEPT ANY ADDITIONAL HDOFS SO I COULD CONCENTRATE ON PROVIDING SEPARATION AND SPACING ON TFC I WAS ALREADY WORKING, ABOUT 10-12 (4 OR 5 ARRS, REST OVERFLTS).
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.