 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Medium large transport got TCASII TA and started a turn then notified ATC. Controller gave opposite direction traffic a turn also.
| Attributes | |
| ACN | 183083 |
| Time | |
| Date | 199107 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : aex |
| State Reference | LA |
| Altitude | msl bound lower : 28000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zhu tracon : srq |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zhu |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| 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 : 12000 flight time type : 240 |
| ASRS Report | 183083 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other flight crewa other other : unspecified |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 24000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
A TCASII return was noted on our scope. At first I suspected it was a ghost return. Switched from 40 to 20 mi range and target was yellow, 12 O'clock and at our altitude. I directed the first officer to start a 30 degree bank turn for 90 degree to our right (were heading 270 degree and told him to go to 360) at the same time I called hou center and asked if they had traffic at our altitude at our 12 O'clock position. The controller told us to immediately turn to 360 degree and told the conflicting traffic to turn 90 degree to the right to 180 degree. My TCASII had alerted us with 'traffic, traffic' at 20-18 mi mark. I was at the correct altitude (28000) heading west. The other aircraft was cleared to FL280 and center dropped the ball on this one. The conflicting traffic was at 12 and the closure rate was 800-950 mph. The TCASII system alerted my crew of the traffic and this conflict. Houston should have vectored or changed the altitude of either my plane or the other traffic. They were caught off guard by my radio call.
Original NASA ASRS Text
Title: MLG GOT TCASII TA AND STARTED A TURN THEN NOTIFIED ATC. CTLR GAVE OPPOSITE DIRECTION TFC A TURN ALSO.
Narrative: A TCASII RETURN WAS NOTED ON OUR SCOPE. AT FIRST I SUSPECTED IT WAS A GHOST RETURN. SWITCHED FROM 40 TO 20 MI RANGE AND TARGET WAS YELLOW, 12 O'CLOCK AND AT OUR ALT. I DIRECTED THE FO TO START A 30 DEG BANK TURN FOR 90 DEG TO OUR R (WERE HDG 270 DEG AND TOLD HIM TO GO TO 360) AT THE SAME TIME I CALLED HOU CENTER AND ASKED IF THEY HAD TFC AT OUR ALT AT OUR 12 O'CLOCK POS. THE CTLR TOLD US TO IMMEDIATELY TURN TO 360 DEG AND TOLD THE CONFLICTING TFC TO TURN 90 DEG TO THE R TO 180 DEG. MY TCASII HAD ALERTED US WITH 'TFC, TFC' AT 20-18 MI MARK. I WAS AT THE CORRECT ALT (28000) HDG W. THE OTHER ACFT WAS CLRED TO FL280 AND CENTER DROPPED THE BALL ON THIS ONE. THE CONFLICTING TFC WAS AT 12 AND THE CLOSURE RATE WAS 800-950 MPH. THE TCASII SYS ALERTED MY CREW OF THE TFC AND THIS CONFLICT. HOUSTON SHOULD HAVE VECTORED OR CHANGED THE ALT OF EITHER MY PLANE OR THE OTHER TFC. THEY WERE CAUGHT OFF GUARD BY MY RADIO CALL.
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.