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Standard separation was lost between wto aircraft when a milfac and a FAA facility failed ot coordination exchange pertinent traffic information.
| Attributes | |
| ACN | 150870 |
| Time | |
| Date | 199007 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ilm |
| State Reference | NC |
| Altitude | msl bound lower : 10000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc military facility : gsb tracon : ilm |
| Operator | other |
| Make Model Name | Fighter |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Small Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 150870 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : departure |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
At approximately xx:55Z I was working R-25 sector at ZDC. I received a handoff from gsb on an fgt at 10000', southbound 10 mi south of wallo intersection. I had a track on an small transport 5 mi north of ilm northbound climbing to approach altitudes (10000'). I advised ilm approach of head on traffic at 10000' and they said he would descend the small transport to 9000' when I hung up the small transport called on my frequency (133.85). At the same time I heard fgt call the sector beside me (R-26). I turned the small transport immediately right to a 090 degree heading and called traffic (he saw the traffic). Ilm approach said gsb approach told him they were holding at wallo intersection at 10000'. A primary target but the aircraft was not holding and I had a good beacon. Callback conversation with revealed the following information. Reporter stated that there were only 2 mi of lateral sep that existed between the 2 aircraft involved in this incident. The incident was the result of poor coordination between the 2 approach control facs, one milfac and the other a FAA TRACON. Top of both approach control airspace is 10000'. Normal procedure is for approach to climb aircraft to 10000' and handoff to ARTCC. Each facility is required to coordination any 10000' traffic that is handed off to ARTCC and will enter the other facs airspace. The fgt was coordination with the TRACON; but the milfac passed erroneous information on fgt. Milfac told the TRACON that the fgt was holding in their airspace. The fact the fgt was en route to warning area 122. ARTCC controller observed the pending conflict and contacted the TRACON to resolve the situation. OJT instructor at TRACON took the ARTCC controller's call and said they would stop/descend the small transport at 9000'. However, before he could realy the revised clearance, the deviation controller turned the small transport over to the center climbing to 10000'. Milfac turned the gt over to the wrong ARTCC sector. ARTCC controller said that he was caught in the middle and he did the best he could under the circumstances.
Original NASA ASRS Text
Title: STANDARD SEPARATION WAS LOST BETWEEN WTO ACFT WHEN A MILFAC AND A FAA FAC FAILED OT COORD EXCHANGE PERTINENT TRAFFIC INFORMATION.
Narrative: AT APPROX XX:55Z I WAS WORKING R-25 SECTOR AT ZDC. I RECEIVED A HDOF FROM GSB ON AN FGT AT 10000', SBND 10 MI S OF WALLO INTXN. I HAD A TRACK ON AN SMT 5 MI N OF ILM NBND CLBING TO APCH ALTS (10000'). I ADVISED ILM APCH OF HEAD ON TFC AT 10000' AND THEY SAID HE WOULD DSND THE SMT TO 9000' WHEN I HUNG UP THE SMT CALLED ON MY FREQ (133.85). AT THE SAME TIME I HEARD FGT CALL THE SECTOR BESIDE ME (R-26). I TURNED THE SMT IMMEDIATELY R TO A 090 DEG HDG AND CALLED TFC (HE SAW THE TFC). ILM APCH SAID GSB APCH TOLD HIM THEY WERE HOLDING AT WALLO INTXN AT 10000'. A PRIMARY TARGET BUT THE ACFT WAS NOT HOLDING AND I HAD A GOOD BEACON. CALLBACK CONVERSATION WITH REVEALED THE FOLLOWING INFO. REPORTER STATED THAT THERE WERE ONLY 2 MI OF LATERAL SEP THAT EXISTED BTWN THE 2 ACFT INVOLVED IN THIS INCIDENT. THE INCIDENT WAS THE RESULT OF POOR COORD BTWN THE 2 APCH CTL FACS, ONE MILFAC AND THE OTHER A FAA TRACON. TOP OF BOTH APCH CTL AIRSPACE IS 10000'. NORMAL PROC IS FOR APCH TO CLB ACFT TO 10000' AND HDOF TO ARTCC. EACH FAC IS REQUIRED TO COORD ANY 10000' TFC THAT IS HANDED OFF TO ARTCC AND WILL ENTER THE OTHER FACS AIRSPACE. THE FGT WAS COORD WITH THE TRACON; BUT THE MILFAC PASSED ERRONEOUS INFO ON FGT. MILFAC TOLD THE TRACON THAT THE FGT WAS HOLDING IN THEIR AIRSPACE. THE FACT THE FGT WAS ENRTE TO WARNING AREA 122. ARTCC CTLR OBSERVED THE PENDING CONFLICT AND CONTACTED THE TRACON TO RESOLVE THE SITUATION. OJT INSTRUCTOR AT TRACON TOOK THE ARTCC CTLR'S CALL AND SAID THEY WOULD STOP/DSND THE SMT AT 9000'. HOWEVER, BEFORE HE COULD REALY THE REVISED CLRNC, THE DEV CTLR TURNED THE SMT OVER TO THE CTR CLBING TO 10000'. MILFAC TURNED THE GT OVER TO THE WRONG ARTCC SECTOR. ARTCC CTLR SAID THAT HE WAS CAUGHT IN THE MIDDLE AND HE DID THE BEST HE COULD UNDER THE CIRCUMSTANCES.
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.