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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier X same altitude assigned had less than standard separation from foreign air carrier Y. System error.
| Attributes | |
| ACN | 247221 |
| Time | |
| Date | 199307 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : cvm |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mmzt |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 2000 |
| ASRS Report | 247221 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X from dfw to mex. Air carrier X was cleared present position, just north of aus, RNAV direct to cvm flight plan route FL310 by ZHU. Houston handed air carrier X off to mty center. Upon establishing radio contact with mty center on 124.5, air carrier X was confirmed radar contact at FL310. On the cvm OO1/B5 air carrier X heard mty center say in mexican for foreign air carrier Y to descend immediately out of FL310 for FL200. When visually acquiring the aircraft, it was passing from left to right on a collision course and crossed directly under air carrier X less than 1000 ft. No call was made to air carrier X. When air carrier X asked mty center about the events, the only thing said was that the aircraft was descending from FL310 to FL200. No further action was taken.
Original NASA ASRS Text
Title: ACR X SAME ALT ASSIGNED HAD LTSS FROM FOREIGN ACR Y. SYS ERROR.
Narrative: ACR X FROM DFW TO MEX. ACR X WAS CLRED PRESENT POS, JUST N OF AUS, RNAV DIRECT TO CVM FLT PLAN RTE FL310 BY ZHU. HOUSTON HANDED ACR X OFF TO MTY CTR. UPON ESTABLISHING RADIO CONTACT WITH MTY CTR ON 124.5, ACR X WAS CONFIRMED RADAR CONTACT AT FL310. ON THE CVM OO1/B5 ACR X HEARD MTY CTR SAY IN MEXICAN FOR FOREIGN ACR Y TO DSND IMMEDIATELY OUT OF FL310 FOR FL200. WHEN VISUALLY ACQUIRING THE ACFT, IT WAS PASSING FROM L TO R ON A COLLISION COURSE AND CROSSED DIRECTLY UNDER ACR X LESS THAN 1000 FT. NO CALL WAS MADE TO ACR X. WHEN ACR X ASKED MTY CTR ABOUT THE EVENTS, THE ONLY THING SAID WAS THAT THE ACFT WAS DSNDING FROM FL310 TO FL200. NO FURTHER ACTION WAS TAKEN.
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.