 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier widebody transport had TCASII RA on crossing traffic, also a visual on same and climbed and turned to avoid conflict.
| Attributes | |
| ACN | 197259 |
| Time | |
| Date | 199112 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ydp |
| State Reference | NF |
| Altitude | msl bound lower : 31000 msl bound upper : 31500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : tul |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : atlantic enroute airway : czqm |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer |
| ASRS Report | 197259 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
At FL310 other widebody transport Y was observed approaching from 4-5 O'clock position at our assigned altitude on a direct collision course. At the same time visual contact was made, and decision to divert was started. At the same time our TCASII voice called, 'traffic, traffic, climb, climb.' the other widebody transport Y apparently did not see us, because they did not try to divert nor report traffic to control. There was another widebody transport above us and in a position slightly ahead of us, to our right, on same track we were on. As we followed the TCASII instruction to climb, we also had to turn right to avoid climbing into other widebody transport. The problem was caused by the controller vectoring the other widebody transport Y to cross supposedly behind us without enough spacing. I still can't figure out why the other widebody transport Y crew did not see us and stop their turn or say something to the controller as the WX was VFR.
Original NASA ASRS Text
Title: ACR WDB HAD TCASII RA ON XING TFC, ALSO A VISUAL ON SAME AND CLBED AND TURNED TO AVOID CONFLICT.
Narrative: AT FL310 OTHER WDB Y WAS OBSERVED APCHING FROM 4-5 O'CLOCK POS AT OUR ASSIGNED ALT ON A DIRECT COLLISION COURSE. AT THE SAME TIME VISUAL CONTACT WAS MADE, AND DECISION TO DIVERT WAS STARTED. AT THE SAME TIME OUR TCASII VOICE CALLED, 'TFC, TFC, CLB, CLB.' THE OTHER WDB Y APPARENTLY DID NOT SEE US, BECAUSE THEY DID NOT TRY TO DIVERT NOR RPT TFC TO CTL. THERE WAS ANOTHER WDB ABOVE US AND IN A POS SLIGHTLY AHEAD OF US, TO OUR R, ON SAME TRACK WE WERE ON. AS WE FOLLOWED THE TCASII INSTRUCTION TO CLB, WE ALSO HAD TO TURN R TO AVOID CLBING INTO OTHER WDB. THE PROBLEM WAS CAUSED BY THE CTLR VECTORING THE OTHER WDB Y TO CROSS SUPPOSEDLY BEHIND US WITHOUT ENOUGH SPACING. I STILL CAN'T FIGURE OUT WHY THE OTHER WDB Y CREW DID NOT SEE US AND STOP THEIR TURN OR SAY SOMETHING TO THE CTLR AS THE WX WAS VFR.
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.