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ZLA experienced operational error at FL320 when issuing descent clearance that conflicted with traffic in the holding pattern.
| Attributes | |
| ACN | 685994 |
| Time | |
| Date | 200601 |
| Place | |
| Locale Reference | navaid : ipl.vortac |
| State Reference | CA |
| Altitude | msl single value : 32000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : holding |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : holding |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 27 |
| ASRS Report | 685994 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert flight crew : took evasive action |
| Consequence | faa : investigated |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I issued a descent to MD80 to FL260. B737 turned in the hold and conflict activated. I told MD80 to stop his descent. I told the supervisor I might have lost separation. The area manager investigated and sent me back to work. I was informed on jan/fri/06 that a loss of separation occurred.
Original NASA ASRS Text
Title: ZLA EXPERIENCED OPERROR AT FL320 WHEN ISSUING DSCNT CLRNC THAT CONFLICTED WITH TFC IN THE HOLDING PATTERN.
Narrative: I ISSUED A DSCNT TO MD80 TO FL260. B737 TURNED IN THE HOLD AND CONFLICT ACTIVATED. I TOLD MD80 TO STOP HIS DSCNT. I TOLD THE SUPVR I MIGHT HAVE LOST SEPARATION. THE AREA MGR INVESTIGATED AND SENT ME BACK TO WORK. I WAS INFORMED ON JAN/FRI/06 THAT A LOSS OF SEPARATION OCCURRED.
Data retrieved from NASA's ASRS site as of January 2009 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.