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ZID associate controller describes operational error experienced at FL410 during opposite direction same altitude traffic; with a descent clearance issued.
| Attributes | |
| ACN | 662967 |
| Time | |
| Date | 200506 |
| Place | |
| Locale Reference | navaid : ape.vortac |
| State Reference | OH |
| Altitude | msl single value : 41000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation X |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citation V |
| 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 : 15 controller time certified in position1 : 15 flight time total : 55 |
| ASRS Report | 662967 |
| Person 2 | |
| Affiliation | government : faa |
| Function | oversight : supervisor |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 20400 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Traffic was being impacted by WX and the buckeye MOA. Aircraft X at FL450 landing mie. Aircraft Y landing dc area. Radar descended aircraft X to FL400 and requested aircraft be level in 2 1/2 mins. Aircraft were head-on with 4 mins separation. Aircraft X 20 seconds later; requested a turn instead of descent. Radar denied request for turn and reaffirmed the descent. I was talking to supervisor to request buckeye MOA altitudes be lowered from FL500 to FL300. Supervisor said ok. I looked back at scope and aircraft were approximately 9-10 mi from each other. Radar issued turns; requested altitude report from aircraft X.
Original NASA ASRS Text
Title: ZID ASSOCIATE CTLR DESCRIBES OPERROR EXPERIENCED AT FL410 DURING OPPOSITE DIRECTION SAME ALT TFC; WITH A DSCNT CLRNC ISSUED.
Narrative: TFC WAS BEING IMPACTED BY WX AND THE BUCKEYE MOA. ACFT X AT FL450 LNDG MIE. ACFT Y LNDG DC AREA. RADAR DSNDED ACFT X TO FL400 AND REQUESTED ACFT BE LEVEL IN 2 1/2 MINS. ACFT WERE HEAD-ON WITH 4 MINS SEPARATION. ACFT X 20 SECONDS LATER; REQUESTED A TURN INSTEAD OF DSCNT. RADAR DENIED REQUEST FOR TURN AND REAFFIRMED THE DSCNT. I WAS TALKING TO SUPVR TO REQUEST BUCKEYE MOA ALTS BE LOWERED FROM FL500 TO FL300. SUPVR SAID OK. I LOOKED BACK AT SCOPE AND ACFT WERE APPROX 9-10 MI FROM EACH OTHER. RADAR ISSUED TURNS; REQUESTED ALT RPT FROM ACFT X.
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.