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While descending through FL290, a B727 flight crew received an immediate turn clearance from an ARTCC radar controller. Shortly after that they received a TCASII TA followed by an RA. The flight crew visually acquired the traffic so they stopped their descent.
| Attributes | |
| ACN | 333160 |
| Time | |
| Date | 199604 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : rmg |
| State Reference | GA |
| Altitude | msl bound lower : 29000 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| 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 | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 14000 flight time type : 10000 |
| ASRS Report | 333160 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 |
| ASRS Report | 332765 |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Descending to FL240 and while passing FL290, ZTL advised us to make an immediate left turn to 020 degrees. About 5 seconds later, TCASII indicated a TA followed shortly by an RA to climb. The descent was stopped and we visually acquired the traffic at 3 O'clock 4-5 mi and 300 ft below us. The RA ceased and we were instructed by ZTL to proceed direct rmg and continue descent. TCASII does continue to be an accurate and valuable tool. Those programs in place in the ctrs obviously still need to be improved upon.
Original NASA ASRS Text
Title: WHILE DSNDING THROUGH FL290, A B727 FLC RECEIVED AN IMMEDIATE TURN CLRNC FROM AN ARTCC RADAR CTLR. SHORTLY AFTER THAT THEY RECEIVED A TCASII TA FOLLOWED BY AN RA. THE FLC VISUALLY ACQUIRED THE TFC SO THEY STOPPED THEIR DSCNT.
Narrative: DSNDING TO FL240 AND WHILE PASSING FL290, ZTL ADVISED US TO MAKE AN IMMEDIATE L TURN TO 020 DEGS. ABOUT 5 SECONDS LATER, TCASII INDICATED A TA FOLLOWED SHORTLY BY AN RA TO CLB. THE DSCNT WAS STOPPED AND WE VISUALLY ACQUIRED THE TFC AT 3 O'CLOCK 4-5 MI AND 300 FT BELOW US. THE RA CEASED AND WE WERE INSTRUCTED BY ZTL TO PROCEED DIRECT RMG AND CONTINUE DSCNT. TCASII DOES CONTINUE TO BE AN ACCURATE AND VALUABLE TOOL. THOSE PROGRAMS IN PLACE IN THE CTRS OBVIOUSLY STILL NEED TO BE IMPROVED UPON.
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.