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ZJX controller experienced operational error at FL240 when descending opposite direction traffic through occupied altitude.
| Attributes | |
| ACN | 695116 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : chs.airport |
| State Reference | SC |
| Altitude | msl single value : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx.artcc tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | other |
| Make Model Name | Stratotanker 135 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 17 controller time certified in position1 : 3 |
| ASRS Report | 695116 |
| 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 other controllera |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 21000 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I was working the charleston low sector at ZJX. Air carrier X appeared on my scope descending to FL240. Due to an active MOA and other traffic; I called the summer sector and requested air carrier X on H190 for descent. Air carrier X checked on my frequency; H190 descending to FL240. I issued air carrier X descent to FL210. A few mins later conflict alert activated with aircraft Y level at FL240. At this time air carrier X was approximately FL248 descending to FL210 about 12 mi north of aircraft Y; opposite direction. I immediately issued a right turn to H230 for air carrier X. Shortly after; I asked air carrier X to tighten the turn to H240. After the aircraft had passed; I returned air carrier X on course.
Original NASA ASRS Text
Title: ZJX CTLR EXPERIENCED OPERROR AT FL240 WHEN DESCENDING OPPOSITE DIRECTION TFC THROUGH OCCUPIED ALT.
Narrative: I WAS WORKING THE CHARLESTON LOW SECTOR AT ZJX. ACR X APPEARED ON MY SCOPE DSNDING TO FL240. DUE TO AN ACTIVE MOA AND OTHER TFC; I CALLED THE SUMMER SECTOR AND REQUESTED ACR X ON H190 FOR DSCNT. ACR X CHKED ON MY FREQ; H190 DSNDING TO FL240. I ISSUED ACR X DSCNT TO FL210. A FEW MINS LATER CONFLICT ALERT ACTIVATED WITH ACFT Y LEVEL AT FL240. AT THIS TIME ACR X WAS APPROX FL248 DSNDING TO FL210 ABOUT 12 MI N OF ACFT Y; OPPOSITE DIRECTION. I IMMEDIATELY ISSUED A R TURN TO H230 FOR ACR X. SHORTLY AFTER; I ASKED ACR X TO TIGHTEN THE TURN TO H240. AFTER THE ACFT HAD PASSED; I RETURNED ACR X ON COURSE.
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.