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ZTL controller attempts to resolve traffic conflict after a carj is already maneuvering due to a TCASII RA caused by a same altitude E145.
| Attributes | |
| ACN | 538015 |
| Time | |
| Date | 200202 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : hmv.vortac |
| State Reference | TN |
| Altitude | msl single value : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc tower : geu.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 17 controller time certified in position1 : 10 |
| ASRS Report | 538015 |
| Person 2 | |
| Affiliation | government : faa |
| Function | oversight : supervisor |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | flight crew : returned to assigned altitude flight crew : took evasive action |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 16800 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #2 was assigned FL280 and switched to ZID frequency. Aircraft #2 checked on ZID leaving FL227, climbing FL280. Traffic was called for aircraft #2, which was aircraft #1 at FL280. Aircraft #1 received TCASII RA to descend, and a second RA to climb. Carj climbed to FL295. Vector was issued. Aircraft missed by 3 mi. Supplemental information from acn 538158: in cruise flight at FL280, we got a TA from TCASII. ZTL directed a turn to heading 150 degrees. As we commenced the turn, TCASII issued an RA with a 'descend, descend.' I disconnected the autoplt and promptly complied. As we established in the green on the vsi, the TCASII reversed commands and gave a command 'climb, climb now.' I complied. After the RA resolved, I returned to FL280. Advised of RA and evasive action. We also advised them that an near midair collision report would be filed. After landing, ZTL was contacted. Supervisor advised that an operational error was being processed on the controller. RA commenced while in a turn, wing up towards conflicting aircraft!
Original NASA ASRS Text
Title: ZTL CTLR ATTEMPTS TO RESOLVE TFC CONFLICT AFTER A CARJ IS ALREADY MANEUVERING DUE TO A TCASII RA CAUSED BY A SAME ALT E145.
Narrative: ACFT #2 WAS ASSIGNED FL280 AND SWITCHED TO ZID FREQ. ACFT #2 CHKED ON ZID LEAVING FL227, CLBING FL280. TFC WAS CALLED FOR ACFT #2, WHICH WAS ACFT #1 AT FL280. ACFT #1 RECEIVED TCASII RA TO DSND, AND A SECOND RA TO CLB. CARJ CLBED TO FL295. VECTOR WAS ISSUED. ACFT MISSED BY 3 MI. SUPPLEMENTAL INFO FROM ACN 538158: IN CRUISE FLT AT FL280, WE GOT A TA FROM TCASII. ZTL DIRECTED A TURN TO HDG 150 DEGS. AS WE COMMENCED THE TURN, TCASII ISSUED AN RA WITH A 'DSND, DSND.' I DISCONNECTED THE AUTOPLT AND PROMPTLY COMPLIED. AS WE ESTABLISHED IN THE GREEN ON THE VSI, THE TCASII REVERSED COMMANDS AND GAVE A COMMAND 'CLB, CLB NOW.' I COMPLIED. AFTER THE RA RESOLVED, I RETURNED TO FL280. ADVISED OF RA AND EVASIVE ACTION. WE ALSO ADVISED THEM THAT AN NMAC RPT WOULD BE FILED. AFTER LNDG, ZTL WAS CONTACTED. SUPVR ADVISED THAT AN OPERROR WAS BEING PROCESSED ON THE CTLR. RA COMMENCED WHILE IN A TURN, WING UP TOWARDS CONFLICTING ACFT!
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.