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ARTCC intrafac coordination. Air carrier X descent through occupied altitude had less than standard separation from cpr Y. System error.
| Attributes | |
| ACN | 263982 |
| Time | |
| Date | 199402 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : eno |
| State Reference | DE |
| Altitude | msl bound lower : 23000 msl bound upper : 23000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : corporate |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 263982 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 45 controller supervisory : 6 |
| ASRS Report | 263722 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 18000 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
Air carrier X was on my frequency. Sector was very busy. I descended air carrier X from FL250 to FL240 and then switched to sector 19 frequency. At the same time, cpr Y was under air carrier X at FL230 and in sector 19 airspace with no pointout. Cpr Y's route was confirmed (rerte) and switched to sector 58. Sector 19 then descended the air carrier X and conflict alert was observed. Callback conversation with reporter revealed the following information: reporter stated aircraft involved were a B737 and a LR25. Reporter stated when cpr Y was rerted he pointed out the aircraft to the sector he coordinated with but failed to give a handoff or pointout to sector 19 that cpr Y was going to transgress. Cpr Y was radar handoff to the next sector so sector 19 did not know about the aircraft. A system error was filed. Supplemental information from acn 263722: cpr Y was en route from ric to isp climbing. He was stopped at FL230 for a final and coordinated with sector below ours. We own FL240 and above. He said pointout approved. Air carrier X was descended to FL240 and handed off to R19. Cpr Y was transferred (handed off) to R58. I saw 190 entered in air carrier X data block. I called R19 to verify. He saw cpr Y and to ensure he wasn't descending air carrier X, he said he was descending air carrier X and he wasn't aware of cpr Y below his air carrier X. Supplemental information from acn 263850: air carrier X was under my control of FL240. Air carrier X was descended to FL190. There was a cpr Y under air carrier X at FL230 which was in my airspace without a pointout. The limited data block was below my full data block and the 2 aircraft were less than standard separation.
Original NASA ASRS Text
Title: ARTCC INTRAFAC COORD. ACR X DSCNT THROUGH OCCUPIED ALT HAD LTSS FROM CPR Y. SYS ERROR.
Narrative: ACR X WAS ON MY FREQ. SECTOR WAS VERY BUSY. I DSNDED ACR X FROM FL250 TO FL240 AND THEN SWITCHED TO SECTOR 19 FREQ. AT THE SAME TIME, CPR Y WAS UNDER ACR X AT FL230 AND IN SECTOR 19 AIRSPACE WITH NO POINTOUT. CPR Y'S RTE WAS CONFIRMED (RERTE) AND SWITCHED TO SECTOR 58. SECTOR 19 THEN DSNDED THE ACR X AND CONFLICT ALERT WAS OBSERVED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED ACFT INVOLVED WERE A B737 AND A LR25. RPTR STATED WHEN CPR Y WAS RERTED HE POINTED OUT THE ACFT TO THE SECTOR HE COORDINATED WITH BUT FAILED TO GIVE A HDOF OR POINTOUT TO SECTOR 19 THAT CPR Y WAS GOING TO TRANSGRESS. CPR Y WAS RADAR HDOF TO THE NEXT SECTOR SO SECTOR 19 DID NOT KNOW ABOUT THE ACFT. A SYS ERROR WAS FILED. SUPPLEMENTAL INFO FROM ACN 263722: CPR Y WAS ENRTE FROM RIC TO ISP CLBING. HE WAS STOPPED AT FL230 FOR A FINAL AND COORDINATED WITH SECTOR BELOW OURS. WE OWN FL240 AND ABOVE. HE SAID POINTOUT APPROVED. ACR X WAS DSNDED TO FL240 AND HANDED OFF TO R19. CPR Y WAS TRANSFERRED (HANDED OFF) TO R58. I SAW 190 ENTERED IN ACR X DATA BLOCK. I CALLED R19 TO VERIFY. HE SAW CPR Y AND TO ENSURE HE WASN'T DSNDING ACR X, HE SAID HE WAS DSNDING ACR X AND HE WASN'T AWARE OF CPR Y BELOW HIS ACR X. SUPPLEMENTAL INFO FROM ACN 263850: ACR X WAS UNDER MY CTL OF FL240. ACR X WAS DSNDED TO FL190. THERE WAS A CPR Y UNDER ACR X AT FL230 WHICH WAS IN MY AIRSPACE WITHOUT A POINTOUT. THE LIMITED DATA BLOCK WAS BELOW MY FULL DATA BLOCK AND THE 2 ACFT WERE LTSS.
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.