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B737 flight crew receives TCASII TA alert for traffic at same altitude as controller issues turns to separate both aircraft.
| Attributes | |
| ACN | 535859 |
| Time | |
| Date | 200201 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : sby.vor |
| State Reference | MD |
| Altitude | msl single value : 39000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 535859 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 535860 |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment : tcas other controllera |
| Resolutory Action | controller : separated traffic controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
Narrative:
Received TA at altitude followed by controller directed turn of 40 degrees right for us and 40 degrees right for another aircraft. Visual contact with other aircraft was never achieved. Unable to say how close 2 aircraft came. Controller advised that other aircraft was on vectors and got too close. Supplemental information from acn 535860: the range selection on both navigation displays was set to the 160 NM range, so it was difficult to see how close the other aircraft was.
Original NASA ASRS Text
Title: B737 FLC RECEIVES TCASII TA ALERT FOR TFC AT SAME ALT AS CTLR ISSUES TURNS TO SEPARATE BOTH ACFT.
Narrative: RECEIVED TA AT ALT FOLLOWED BY CTLR DIRECTED TURN OF 40 DEGS R FOR US AND 40 DEGS R FOR ANOTHER ACFT. VISUAL CONTACT WITH OTHER ACFT WAS NEVER ACHIEVED. UNABLE TO SAY HOW CLOSE 2 ACFT CAME. CTLR ADVISED THAT OTHER ACFT WAS ON VECTORS AND GOT TOO CLOSE. SUPPLEMENTAL INFO FROM ACN 535860: THE RANGE SELECTION ON BOTH NAV DISPLAYS WAS SET TO THE 160 NM RANGE, SO IT WAS DIFFICULT TO SEE HOW CLOSE THE OTHER ACFT WAS.
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.