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ZTL issued an A319 crew, at FL350, 2 10-degree turns left, then an immediate tight turn to the right to avoid converging traffic. A TCASII RA was received and evasive action was taken by the crew to remain clear of the traffic.
| Attributes | |
| ACN | 427664 |
| Time | |
| Date | 199902 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| State Reference | AL |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : ztl.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | L-1011 Tri-Star All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 65 flight time total : 10000 flight time type : 65 |
| ASRS Report | 427664 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 6000 flight time type : 400 |
| ASRS Report | 427783 |
| Events | |
| Anomaly | conflict : airborne critical non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment : tcas other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued advisory flight crew : took evasive action |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Captain was PNF. First officer was PF. Autoplt was engaged. While captain was communicating on interphone with the flight attendants, ATC directed a 10 degree left turn for traffic. First officer acknowledged and complied by changing heading 10 degrees left. About 2 mins later, ATC requested another 10 degree left turn. This time, captain acknowledged and first officer again turned the aircraft to the left. ATC then advised of traffic ahead which was acquired visually and on TCASII. Shortly thereafter, ATC directed an immediate right turn to 295 degrees and make it 'tight.' TCASII TA occurred. First officer disconnected autoplt and increased angle of bank as TCASII RA occurred to 'monitor vertical speed.' TCASII RA commands were complied with as first officer turned aircraft. No altitude change was required or made. Traffic was observed on TCASII to be descending and passed to the left by approximately 2-5 mi and 500 ft below our altitude. 'Clear of conflict' then was annunciated by TCASII prior to completing turn to 295 degrees.
Original NASA ASRS Text
Title: ZTL ISSUED AN A319 CREW, AT FL350, 2 10-DEG TURNS L, THEN AN IMMEDIATE TIGHT TURN TO THE R TO AVOID CONVERGING TFC. A TCASII RA WAS RECEIVED AND EVASIVE ACTION WAS TAKEN BY THE CREW TO REMAIN CLR OF THE TFC.
Narrative: CAPT WAS PNF. FO WAS PF. AUTOPLT WAS ENGAGED. WHILE CAPT WAS COMMUNICATING ON INTERPHONE WITH THE FLT ATTENDANTS, ATC DIRECTED A 10 DEG L TURN FOR TFC. FO ACKNOWLEDGED AND COMPLIED BY CHANGING HDG 10 DEGS L. ABOUT 2 MINS LATER, ATC REQUESTED ANOTHER 10 DEG L TURN. THIS TIME, CAPT ACKNOWLEDGED AND FO AGAIN TURNED THE ACFT TO THE L. ATC THEN ADVISED OF TFC AHEAD WHICH WAS ACQUIRED VISUALLY AND ON TCASII. SHORTLY THEREAFTER, ATC DIRECTED AN IMMEDIATE R TURN TO 295 DEGS AND MAKE IT 'TIGHT.' TCASII TA OCCURRED. FO DISCONNECTED AUTOPLT AND INCREASED ANGLE OF BANK AS TCASII RA OCCURRED TO 'MONITOR VERT SPD.' TCASII RA COMMANDS WERE COMPLIED WITH AS FO TURNED ACFT. NO ALT CHANGE WAS REQUIRED OR MADE. TFC WAS OBSERVED ON TCASII TO BE DSNDING AND PASSED TO THE L BY APPROX 2-5 MI AND 500 FT BELOW OUR ALT. 'CLR OF CONFLICT' THEN WAS ANNUNCIATED BY TCASII PRIOR TO COMPLETING TURN TO 295 DEGS.
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.