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ZOB controller approves transitioning B737 through his sector, then descends a DC10, which conflicts with the B737. When jxn control sector questions the reporter, he issues vectors, which are insufficient to maintain legal separation.
| Attributes | |
| ACN | 429420 |
| Time | |
| Date | 199903 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : lfd.vortac |
| State Reference | MI |
| Altitude | msl single value : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 25 |
| ASRS Report | 429420 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | other controllera |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 27000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Pointout from jxn sector air carrier Y direct gsh at FL200. 30 seconds later, jxn sector approves air carrier Y climb to FL220. I approve FL220. A short time later, I descend air carrier X from FL210 to 14000 ft, direct mizar. Jxn radar asks if I'm descending air carrier X. I turned to a 180 degree heading. Loss of separation occurs. An oversight on my part, I guess.
Original NASA ASRS Text
Title: ZOB CTLR APPROVES TRANSITIONING B737 THROUGH HIS SECTOR, THEN DSNDS A DC10, WHICH CONFLICTS WITH THE B737. WHEN JXN CTL SECTOR QUESTIONS THE RPTR, HE ISSUES VECTORS, WHICH ARE INSUFFICIENT TO MAINTAIN LEGAL SEPARATION.
Narrative: POINTOUT FROM JXN SECTOR ACR Y DIRECT GSH AT FL200. 30 SECONDS LATER, JXN SECTOR APPROVES ACR Y CLB TO FL220. I APPROVE FL220. A SHORT TIME LATER, I DSND ACR X FROM FL210 TO 14000 FT, DIRECT MIZAR. JXN RADAR ASKS IF I'M DSNDING ACR X. I TURNED TO A 180 DEG HDG. LOSS OF SEPARATION OCCURS. AN OVERSIGHT ON MY PART, I GUESS.
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.