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ZBW controller experienced operational error at fl 270 when attempting to climb one aircraft above another; corrective action too late to save separation.
| Attributes | |
| ACN | 802722 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : cmk.vor |
| State Reference | NY |
| Altitude | msl single value : 27000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | climbout : intermediate altitude ground : parked |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.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 : 2 |
| ASRS Report | 802722 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25200 vertical : 500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
I do not remember what the various settings of the operational equipment were at the time. E145 FL270 was direct btv. B737 was direct sbj climbing to FL260. Based on observed climb rates from B734 I climbed aircraft to FL360. Realizing aircraft were in conflict I turned E145 as well as B734 who was already on a vector for E145. I confirmed altitude assignments on both aircraft. Separation was lost.
Original NASA ASRS Text
Title: ZBW CTLR EXPERIENCED OPERROR AT FL 270 WHEN ATTEMPTING TO CLIMB ONE ACFT ABOVE ANOTHER; CORRECTIVE ACTION TOO LATE TO SAVE SEPARATION.
Narrative: I DO NOT REMEMBER WHAT THE VARIOUS SETTINGS OF THE OPERATIONAL EQUIP WERE AT THE TIME. E145 FL270 WAS DIRECT BTV. B737 WAS DIRECT SBJ CLBING TO FL260. BASED ON OBSERVED CLB RATES FROM B734 I CLBED ACFT TO FL360. REALIZING ACFT WERE IN CONFLICT I TURNED E145 AS WELL AS B734 WHO WAS ALREADY ON A VECTOR FOR E145. I CONFIRMED ALT ASSIGNMENTS ON BOTH ACFT. SEPARATION WAS LOST.
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.