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B737NG flight crew reported some speed instability resulted from a wake turbulence encounter 7 miles in trail of a B777 on short final into iah.
| Attributes | |
| ACN | 1535352 |
| Time | |
| Date | 201804 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | IAH.Airport |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 3423 |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Type 722 |
| Events | |
| Anomaly | Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence |
Narrative:
VFR arrival at iah. We were following a heavy 777 over 7 miles in trail. At 600 feet speed jumped up temporarily in a gust or wake onset and too much thrust. I called for speed correction and first officer responded. I was focused on monitoring vertical and lateral tolerances while avoiding a speed exceedance for our flap 30 configuration. We approached the speed stability limit on the high side but I never saw it exceeded. Things quickly settled down before I could identify out of parameters. From 500 feet down things [were] stable. The weather [was] generally good except this quick and brief burble.
Original NASA ASRS Text
Title: B737NG flight crew reported some speed instability resulted from a wake turbulence encounter 7 miles in trail of a B777 on short final into IAH.
Narrative: VFR arrival at IAH. We were following a heavy 777 over 7 miles in trail. At 600 feet speed jumped up temporarily in a gust or wake onset and too much thrust. I called for speed correction and FO responded. I was focused on monitoring vertical and lateral tolerances while avoiding a speed exceedance for our flap 30 configuration. We approached the speed stability limit on the high side but I never saw it exceeded. Things quickly settled down before I could identify out of parameters. From 500 feet down things [were] stable. The weather [was] generally good except this quick and brief burble.
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.