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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier Y uncoord climb through occupied altitude had less than standard separation from aircraft Y TCASII RA. Evasive action taken. System error.
| Attributes | |
| ACN | 284535 |
| Time | |
| Date | 199409 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mol |
| State Reference | VA |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tracon : n90 |
| Operator | general aviation : personal |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 2 |
| ASRS Report | 284535 |
| 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 | atc equipment other atc equipment : unspecified aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 1400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
I was working (R72) when I had X eastbound J-42 at FL370 vicinity of mol VOR when I noticed swbound at FL354 climbing FL390. The conflict alert was activated. I immediately turned X right. Within 2 seconds, 52 yelled I'm turning mine left so I immediately turned X left to a 270 degree heading. I then noticed turn right into X. I called traffic and X advised TCASII climb. I issued climb clearance to FL390 to X. Separation resumed. 1) I notice conflict alert (Y was not on scope prior to conflict alert. R52 climbed Y to FL390 and forgot R72 was open). 2) I turned my aircraft X right. 3) I heard R52 controller say, 'I'm going left.' 4) I immediately turned X left. 5) targets merged as Y turned right, not left. 6) TCASII went off on nxxxx and aircraft advised climb and said had visual on traffic. 7) I climbed X to FL390.
Original NASA ASRS Text
Title: ACR Y UNCOORD CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACFT Y TCASII RA. EVASIVE ACTION TAKEN. SYS ERROR.
Narrative: I WAS WORKING (R72) WHEN I HAD X EBOUND J-42 AT FL370 VICINITY OF MOL VOR WHEN I NOTICED SWBOUND AT FL354 CLBING FL390. THE CONFLICT ALERT WAS ACTIVATED. I IMMEDIATELY TURNED X R. WITHIN 2 SECONDS, 52 YELLED I'M TURNING MINE L SO I IMMEDIATELY TURNED X L TO A 270 DEG HDG. I THEN NOTICED TURN R INTO X. I CALLED TFC AND X ADVISED TCASII CLB. I ISSUED CLB CLRNC TO FL390 TO X. SEPARATION RESUMED. 1) I NOTICE CONFLICT ALERT (Y WAS NOT ON SCOPE PRIOR TO CONFLICT ALERT. R52 CLBED Y TO FL390 AND FORGOT R72 WAS OPEN). 2) I TURNED MY ACFT X R. 3) I HEARD R52 CTLR SAY, 'I'M GOING L.' 4) I IMMEDIATELY TURNED X L. 5) TARGETS MERGED AS Y TURNED R, NOT L. 6) TCASII WENT OFF ON NXXXX AND ACFT ADVISED CLB AND SAID HAD VISUAL ON TFC. 7) I CLBED X TO FL390.
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.