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ARTCC controller has less than standard separation between widebody transport descending and medium large transport climbing on crossing courses.
| Attributes | |
| ACN | 191236 |
| Time | |
| Date | 199110 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eck |
| State Reference | MI |
| Altitude | msl bound lower : 27500 msl bound upper : 29000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 1 controller radar : 2 |
| ASRS Report | 191236 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 28200 vertical : 1500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Widebody transport X was eastbound proceeding direct eck direct ynt and had a restriction to cross eck at FL290. Medium large transport Y was swbound over eck J94 pmm climbing to FL310. Approximately 20 mi northeast of eck the conflict alert was activated. Widebody transport X was level at FL290 and medium large transport Y was out of FL300. Medium large transport Y was issued a turn to 310 degree. Widebody transport X was issued a turn to 230 degree (no response). Medium large transport Y was told to expedite his climb (no response). Medium large transport Y was told to report level at FL310 (no response). Medium large transport Y confirmed level 12 seconds after operational error. One of the contributing factors is a 'blind spot' northeast of eck that has been there for yrs.
Original NASA ASRS Text
Title: ARTCC CTLR HAS LTSS BTWN WDB DSNDING AND MLG CLBING ON XING COURSES.
Narrative: WDB X WAS EBOUND PROCEEDING DIRECT ECK DIRECT YNT AND HAD A RESTRICTION TO CROSS ECK AT FL290. MLG Y WAS SWBOUND OVER ECK J94 PMM CLBING TO FL310. APPROX 20 MI NE OF ECK THE CONFLICT ALERT WAS ACTIVATED. WDB X WAS LEVEL AT FL290 AND MLG Y WAS OUT OF FL300. MLG Y WAS ISSUED A TURN TO 310 DEG. WDB X WAS ISSUED A TURN TO 230 DEG (NO RESPONSE). MLG Y WAS TOLD TO EXPEDITE HIS CLB (NO RESPONSE). MLG Y WAS TOLD TO RPT LEVEL AT FL310 (NO RESPONSE). MLG Y CONFIRMED LEVEL 12 SECONDS AFTER OPERROR. ONE OF THE CONTRIBUTING FACTORS IS A 'BLIND SPOT' NE OF ECK THAT HAS BEEN THERE FOR YRS.
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.