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ZID controller experienced operational error at FL300 while descending air carrier below crossing traffic.
| Attributes | |
| ACN | 772810 |
| Time | |
| Date | 200802 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : cvg.airport |
| State Reference | KY |
| Altitude | msl single value : 30000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tower : zzzz.tower |
| 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 | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar controller : military |
| Experience | controller military : 3 controller radar : 18 controller time certified in position1 : 16 |
| ASRS Report | 772810 |
| 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 |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 12000 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
MD80 was nebound at FL310 and I needed to descend him under cvg arrs from the west that were at FL290. My plan was to start him down after passing wbound B737 at FL300. I had just coordination higher altitude for another aircraft; sequenced a cvg arrival from the south when conflict alert activated because I had already put FL240 in the MD80's data block. MD80 reported at FL310 and I descended him; but I had already descended him.
Original NASA ASRS Text
Title: ZID CTLR EXPERIENCED OPERROR AT FL300 WHILE DESCENDING ACR BELOW CROSSING TFC.
Narrative: MD80 WAS NEBOUND AT FL310 AND I NEEDED TO DSND HIM UNDER CVG ARRS FROM THE W THAT WERE AT FL290. MY PLAN WAS TO START HIM DOWN AFTER PASSING WBOUND B737 AT FL300. I HAD JUST COORD HIGHER ALT FOR ANOTHER ACFT; SEQUENCED A CVG ARR FROM THE S WHEN CONFLICT ALERT ACTIVATED BECAUSE I HAD ALREADY PUT FL240 IN THE MD80'S DATA BLOCK. MD80 RPTED AT FL310 AND I DSNDED HIM; BUT I HAD ALREADY DSNDED HIM.
Data retrieved from NASA's ASRS site as of May 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.