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ARTCC controller had widebody transport at wrong altitude for direction of flight, late descent for opposite direction traffic on oceanic route, less than standard separation occurred.
| Attributes | |
| ACN | 175425 |
| Time | |
| Date | 199104 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : yyt |
| State Reference | NF |
| Altitude | msl bound lower : 32800 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 4 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : other oceanic enroute : atlantic enroute airway : czqx |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Heavy Transport, Low Wing, 4 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : instrument pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 140 flight time total : 20000 flight time type : 7700 |
| ASRS Report | 175425 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | faa : reviewed incident with flight crew Other |
| Miss Distance | horizontal : 6000 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
We were westbound to chkpoint 48N 50W. At about 45W at FL330 on flight from cdg to mia. We received clearance to descend to FL310. No urgency was indicated. We requested FL350 and were almost immediately told by gander HF radio that center wanted us at FL310. At approximately 1MI after initial clearance to FL310 and approximately 32800', a cargo heavy transport Y passed us approximately 1 NM north enebnd at FL330. Gander center late acknowledged that the mistake had been made by gander ATC. Company officials state that our aircraft was TCASII equipped. We received no TCASII alert. If in fact our aircraft was TCASII equipped. I do not know whether the TCASII was not in the TA/RA mode, or if in TA/RA mode, whether it simply failed to function properly.
Original NASA ASRS Text
Title: ARTCC CTLR HAD WDB AT WRONG ALT FOR DIRECTION OF FLT, LATE DESCENT FOR OPPOSITE DIRECTION TRAFFIC ON OCEANIC ROUTE, LESS THAN STANDARD SEPARATION OCCURRED.
Narrative: WE WERE WBND TO CHKPOINT 48N 50W. AT ABOUT 45W AT FL330 ON FLT FROM CDG TO MIA. WE RECEIVED CLRNC TO DSND TO FL310. NO URGENCY WAS INDICATED. WE REQUESTED FL350 AND WERE ALMOST IMMEDIATELY TOLD BY GANDER HF RADIO THAT CENTER WANTED US AT FL310. AT APPROX 1MI AFTER INITIAL CLRNC TO FL310 AND APPROX 32800', A CARGO HVT Y PASSED US APPROX 1 NM N ENEBND AT FL330. GANDER CENTER LATE ACKNOWLEDGED THAT THE MISTAKE HAD BEEN MADE BY GANDER ATC. COMPANY OFFICIALS STATE THAT OUR ACFT WAS TCASII EQUIPPED. WE RECEIVED NO TCASII ALERT. IF IN FACT OUR ACFT WAS TCASII EQUIPPED. I DO NOT KNOW WHETHER THE TCASII WAS NOT IN THE TA/RA MODE, OR IF IN TA/RA MODE, WHETHER IT SIMPLY FAILED TO FUNCTION PROPERLY.
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.