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ZOB controller experienced operational error at FL355 when incorrect altitude assignment readback was missed and conflict developed.
| Attributes | |
| ACN | 781827 |
| Time | |
| Date | 200804 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : vwv.vor |
| State Reference | OH |
| Altitude | msl bound lower : 35500 msl bound upper : 36000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc tower : lga.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 |
| ASRS Report | 781827 |
| 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 : 24000 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
A320 wbound at FL340 J60 request FL360. I turned A320 10 degrees left and climbed to FL350. A320 read back FL360 but I missed it. I called traffic for A320 'at 6 O'clock position and 2 1/2 mi; wbound FL360.' I told A320 I'd have higher once he cleared the traffic at FL360. Conflict alert activated once A320 climbed above FL350. I descended A320 to FL350.
Original NASA ASRS Text
Title: ZOB CTLR EXPERIENCED OPERROR AT FL355 WHEN INCORRECT ALT ASSIGNMENT READBACK WAS MISSED AND CONFLICT DEVELOPED.
Narrative: A320 WBOUND AT FL340 J60 REQUEST FL360. I TURNED A320 10 DEGS L AND CLBED TO FL350. A320 READ BACK FL360 BUT I MISSED IT. I CALLED TFC FOR A320 'AT 6 O'CLOCK POS AND 2 1/2 MI; WBOUND FL360.' I TOLD A320 I'D HAVE HIGHER ONCE HE CLRED THE TFC AT FL360. CONFLICT ALERT ACTIVATED ONCE A320 CLBED ABOVE FL350. I DSNDED A320 TO FL350.
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.