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Cargo widebody captain reported selecting a 1 mile offset after a wake turbulence encounter; and was questioned by ATC regarding the deviation.
| Attributes | |
| ACN | 1282300 |
| Time | |
| Date | 201507 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZME.ARTCC |
| State Reference | TN |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Large Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR BRBBQ1 Arrival |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence |
Narrative:
There were calm winds on descent tracking the BRBBQ1 STAR landing north. We encountered wake turbulence that rolled our aircraft 10-12 degrees on the longitudinal axis for a couple of miles. I told first officer to offset to the right. We entered 1 mile right offset in the mcdu. A few minutes later center mentioned we appeared to be off course. I told him we had offset 1 mile due to wake turbulence. The aircraft in front of us was 10 miles ahead. We were not off course. I am under the impression we get 4 miles before being 'off course.'wake turbulence on these arrivals occur with no winds aloft. Offsets work fine getting out of the turbulence.allow offsets.
Original NASA ASRS Text
Title: Cargo widebody Captain reported selecting a 1 mile offset after a wake turbulence encounter; and was questioned by ATC regarding the deviation.
Narrative: There were calm winds on descent tracking the BRBBQ1 STAR landing north. We encountered wake turbulence that rolled our aircraft 10-12 degrees on the longitudinal axis for a couple of miles. I told First Officer to offset to the right. We entered 1 mile right offset in the MCDU. A few minutes later Center mentioned we appeared to be off course. I told him we had offset 1 mile due to wake turbulence. The aircraft in front of us was 10 miles ahead. We were not off course. I am under the impression we get 4 miles before being 'off course.'Wake turbulence on these arrivals occur with no winds aloft. Offsets work fine getting out of the turbulence.Allow offsets.
Data retrieved from NASA's ASRS site 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.