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ZOB associate controller described operational error during position relief period when controller assuming position failed to see traffic prior to descent issuance.
| Attributes | |
| ACN | 675714 |
| Time | |
| Date | 200510 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : dkk.vor |
| State Reference | NY |
| Altitude | msl single value : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 170/175 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller limited radar : 14 controller radar : 13 controller time certified in position1 : 14 flight time total : 42 |
| ASRS Report | 675714 |
| 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 |
| Miss Distance | horizontal : 26400 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Numerous aircraft; complex traffic. Air carrier X at FL350 for hpn merging with air carrier Z from area vii at FL350. Area vii handed air carrier X earlier and called to let us know what we had already determined; that the 2 aircraft were merging. We had a syr lander under air carrier X that had to leave FL330 before he could start down. Overlooked air carrier Y in scan of the data blocks and radar controller started air carrier X down. Immediately was told by relieved controller about air carrier Y and corrective action was taken right away. No chance for it to work in time. It was too short of time span.
Original NASA ASRS Text
Title: ZOB ASSOCIATE CTLR DESCRIBED OPERROR DURING POS RELIEF PERIOD WHEN CTLR ASSUMING POS FAILED TO SEE TFC PRIOR TO DSCNT ISSUANCE.
Narrative: NUMEROUS ACFT; COMPLEX TFC. ACR X AT FL350 FOR HPN MERGING WITH ACR Z FROM AREA VII AT FL350. AREA VII HANDED ACR X EARLIER AND CALLED TO LET US KNOW WHAT WE HAD ALREADY DETERMINED; THAT THE 2 ACFT WERE MERGING. WE HAD A SYR LANDER UNDER ACR X THAT HAD TO LEAVE FL330 BEFORE HE COULD START DOWN. OVERLOOKED ACR Y IN SCAN OF THE DATA BLOCKS AND RADAR CTLR STARTED ACR X DOWN. IMMEDIATELY WAS TOLD BY RELIEVED CTLR ABOUT ACR Y AND CORRECTIVE ACTION WAS TAKEN RIGHT AWAY. NO CHANCE FOR IT TO WORK IN TIME. IT WAS TOO SHORT OF TIME SPAN.
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.