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B737NG captain reported slowing below assigned airspeed after encountering wake turbulence on arrival into ord.
| Attributes | |
| ACN | 1586908 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ORD.Airport |
| State Reference | IL |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 136 Flight Crew Total 11924 Flight Crew Type 9215 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
On a visual approach to 27L ord. Encountered intermittent wake from preceding aircraft. Around grabl airspeed dropped off by approximately 20 kts. During recovery to assigned 250 kts; ATC asked us not to slow until advised (mentioned this as we were recovering through approximately 234 kts). We acknowledged and continued to landing with a stable approach. We did not slow the speed intentionally; but since ATC mentioned it; I felt an explanation was warranted. Autopilot was engaged initially; but was disengaged to recover airspeed and continue visual approach and landing.
Original NASA ASRS Text
Title: B737NG Captain reported slowing below assigned airspeed after encountering wake turbulence on arrival into ORD.
Narrative: On a visual approach to 27L ORD. Encountered intermittent wake from preceding aircraft. Around GRABL airspeed dropped off by approximately 20 kts. During recovery to assigned 250 kts; ATC asked us not to slow until advised (mentioned this as we were recovering through approximately 234 kts). We acknowledged and continued to landing with a stable approach. We did not slow the speed intentionally; but since ATC mentioned it; I felt an explanation was warranted. Autopilot was engaged initially; but was disengaged to recover airspeed and continue visual approach and landing.
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.