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ZBW controller experienced operational error at FL230 when PC12 delayed descent because of turbulence resulting in an overtake separation issue.
| Attributes | |
| ACN | 775855 |
| Time | |
| Date | 200802 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : bdr.vor |
| State Reference | NY |
| Altitude | msl single value : 23000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zbw.artcc |
| Operator | general aviation : personal |
| Make Model Name | PC-12 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 27 |
| ASRS Report | 775855 |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : turbulence 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 : 28680 vertical : 200 |
| Supplementary | |
| Problem Areas | Weather Environmental Factor ATC Human Performance Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Because of moderate turbulence; the PC12 remained at FL230 longer than usual and was overtaken by the B757 at FL230.
Original NASA ASRS Text
Title: ZBW CTLR EXPERIENCED OPERROR AT FL230 WHEN PC12 DELAYED DESCENT BECAUSE OF TURBULENCE RESULTING IN AN OVERTAKE SEPARATION ISSUE.
Narrative: BECAUSE OF MODERATE TURB; THE PC12 REMAINED AT FL230 LONGER THAN USUAL AND WAS OVERTAKEN BY THE B757 AT FL230.
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.