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Light transport flight crew is given descent clearance and upon complying they receive a TCASII RA to climb. Upon being notified of the climb, center issued a vector and then apologized.
| Attributes | |
| ACN | 369596 |
| Time | |
| Date | 199705 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : irq |
| State Reference | SC |
| Altitude | msl bound lower : 28700 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx artcc : zau |
| Operator | general aviation : corporate |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 95 flight time total : 13400 flight time type : 1900 |
| ASRS Report | 369596 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 9000 vertical : 600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Approximately 40 mi south of irq we were given a descent from FL290 to FL240. Upon starting this descent we received a traffic alert. At 28700 ft, this became an RA to monitor vertical speed. A target was noted at 12:30 O'clock position and 8 mi. I started a climb back to FL290 and advised ATC, who then advised our aircraft to turn 30 degrees left immediately. We complied and the controller apologized and then asked our aircraft to maintain FL290. The first officer noted that the TCASII showed 600 ft of separation and less than 2 mi at our closest point to the other aircraft. (TCASII works.) this was a controller error that TCASII helped with and our evasive action was only in the form of an abrupt turn at high speed.
Original NASA ASRS Text
Title: LTT FLC IS GIVEN DSCNT CLRNC AND UPON COMPLYING THEY RECEIVE A TCASII RA TO CLB. UPON BEING NOTIFIED OF THE CLB, CTR ISSUED A VECTOR AND THEN APOLOGIZED.
Narrative: APPROX 40 MI S OF IRQ WE WERE GIVEN A DSCNT FROM FL290 TO FL240. UPON STARTING THIS DSCNT WE RECEIVED A TFC ALERT. AT 28700 FT, THIS BECAME AN RA TO MONITOR VERT SPD. A TARGET WAS NOTED AT 12:30 O'CLOCK POS AND 8 MI. I STARTED A CLB BACK TO FL290 AND ADVISED ATC, WHO THEN ADVISED OUR ACFT TO TURN 30 DEGS L IMMEDIATELY. WE COMPLIED AND THE CTLR APOLOGIZED AND THEN ASKED OUR ACFT TO MAINTAIN FL290. THE FO NOTED THAT THE TCASII SHOWED 600 FT OF SEPARATION AND LESS THAN 2 MI AT OUR CLOSEST POINT TO THE OTHER ACFT. (TCASII WORKS.) THIS WAS A CTLR ERROR THAT TCASII HELPED WITH AND OUR EVASIVE ACTION WAS ONLY IN THE FORM OF AN ABRUPT TURN AT HIGH SPD.
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.