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ZBW controller experienced operational error at FL180 during overtake climb event; issued corrective turn; but not enough angle to secure separation.
| Attributes | |
| ACN | 762277 |
| Time | |
| Date | 200711 |
| Place | |
| Locale Reference | airport : bos.airport |
| State Reference | MA |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 29 |
| ASRS Report | 762277 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 26000 vertical : 100 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X and air carrier Y proceeding over lucos. Air carrier Y overtaking air carrier X. Air carrier X turned direct sey (both aircraft cleared via bos lucos sey) and air carrier Y turned 30 degrees left. Turn was not enough to ensure separation. 4.93 mi horizontal and 100.
Original NASA ASRS Text
Title: ZBW CTLR EXPERIENCED OPERROR AT FL180 DURING OVERTAKE CLIMB EVENT; ISSUED CORRECTIVE TURN; BUT NOT ENOUGH ANGLE TO SECURE SEPARATION.
Narrative: ACR X AND ACR Y PROCEEDING OVER LUCOS. ACR Y OVERTAKING ACR X. ACR X TURNED DIRECT SEY (BOTH ACFT CLRED VIA BOS LUCOS SEY) AND ACR Y TURNED 30 DEGS L. TURN WAS NOT ENOUGH TO ENSURE SEPARATION. 4.93 MI HORIZ AND 100.
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.