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A319 captain reported descending below the profile on descent to iad when they encountered turbulence that may have been a wake encounter.
| Attributes | |
| ACN | 1474961 |
| Time | |
| Date | 201708 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | IAD.Airport |
| State Reference | DC |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR CAVLR3 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Altitude Overshoot Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
On the CAVLR3 arrival into iad at FL220 we were cleared to 'descend via'. The first officer was flying [and] he put 6000 ft in the altitude window. I went off COM1 to say goodbye to passengers and give arrival brief. We encountered some turbulence and autopilot disengaged. I came back to COM1 and noticed we were below profile and the first officer was correcting manually. Exact altitude loss unknown; recaptured profile. No word from ATC. PIREP: possible mountain wave or wake turbulence.unknown or possible attention to aircraft trailing. Also weather could have been a factor. Suggest offsetting further from aircraft ahead? Possibly intervene sooner.
Original NASA ASRS Text
Title: A319 Captain reported descending below the profile on descent to IAD when they encountered turbulence that may have been a wake encounter.
Narrative: On the CAVLR3 arrival into IAD at FL220 we were cleared to 'descend via'. The FO was flying [and] he put 6000 ft in the altitude window. I went off COM1 to say goodbye to passengers and give arrival brief. We encountered some turbulence and autopilot disengaged. I came back to COM1 and noticed we were below profile and the FO was correcting manually. Exact altitude loss unknown; recaptured profile. No word from ATC. PIREP: possible mountain wave or wake turbulence.Unknown or possible attention to aircraft trailing. Also weather could have been a factor. Suggest offsetting further from aircraft ahead? Possibly intervene sooner.
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.