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Flight crew of B757 has TCASII TA then RA as they approach an intersection on atlantic route. Another air carrier is crossing the same intersection at same altitude.
| Attributes | |
| ACN | 389007 |
| Time | |
| Date | 199712 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cur |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 31800 |
| Aircraft 1 | |
| Controlling Facilities | artcc : tncf |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 389007 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 389004 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Dusan intersection. We were on A315 headed nnw. Air carrier B was headed south on A567 to aruba. Both reported estimate to dusan, the intersection of A315 and A567, at the same time and at the same altitude. We watched TCASII as air carrier B approached within 20 mi. Control was busy apparently trying to figure out where we 'us' and they were. Shortly after a TA displayed we started a climb. Pitch was increased when an RA displayed. Maximum altitude was about 31800 ft, 1700 ft above air carrier B who had descended. We both crossed dusan at the same time, our reported estimate. Curacao control did not comment. Supplemental information from acn 389004: I was flying the jet, noticed a TCASII target at 40 NM with a converging vector towards us at our altitude, advised the captain. At 10 NM he was still on a collision vector. At roughly 7 NM I disconnected the autoplt and started a climb. Seconds later we received a TCASII resolution, then a climb command.
Original NASA ASRS Text
Title: FLC OF B757 HAS TCASII TA THEN RA AS THEY APCH AN INTXN ON ATLANTIC RTE. ANOTHER ACR IS XING THE SAME INTXN AT SAME ALT.
Narrative: DUSAN INTXN. WE WERE ON A315 HEADED NNW. ACR B WAS HEADED S ON A567 TO ARUBA. BOTH RPTED ESTIMATE TO DUSAN, THE INTXN OF A315 AND A567, AT THE SAME TIME AND AT THE SAME ALT. WE WATCHED TCASII AS ACR B APCHED WITHIN 20 MI. CTL WAS BUSY APPARENTLY TRYING TO FIGURE OUT WHERE WE 'US' AND THEY WERE. SHORTLY AFTER A TA DISPLAYED WE STARTED A CLB. PITCH WAS INCREASED WHEN AN RA DISPLAYED. MAX ALT WAS ABOUT 31800 FT, 1700 FT ABOVE ACR B WHO HAD DSNDED. WE BOTH CROSSED DUSAN AT THE SAME TIME, OUR RPTED ESTIMATE. CURACAO CTL DID NOT COMMENT. SUPPLEMENTAL INFO FROM ACN 389004: I WAS FLYING THE JET, NOTICED A TCASII TARGET AT 40 NM WITH A CONVERGING VECTOR TOWARDS US AT OUR ALT, ADVISED THE CAPT. AT 10 NM HE WAS STILL ON A COLLISION VECTOR. AT ROUGHLY 7 NM I DISCONNECTED THE AUTOPLT AND STARTED A CLB. SECONDS LATER WE RECEIVED A TCASII RESOLUTION, THEN A CLB COMMAND.
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.