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An SF340B captain reported encountering wake vortex from a preceding B777 on approach to iad that resulted in an uncommanded 25 degree left bank. A go-around was executed.
| Attributes | |
| ACN | 988331 |
| Time | |
| Date | 201201 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | IAD.Airport |
| State Reference | DC |
| Aircraft 1 | |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Visual Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Flight Phase | Landing |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
During a visual approach to iad runway 19L we encountered wake turbulence about 100 ft AGL. This wake turbulence caused an uncommanded 25 degree left bank. We immediately executed a go-around and made our return via approach vectors to conduct a visual approach to 19L. We landed and returned to the gate without further incident. Potomac approach had vectored us to follow a B777 at 5 miles in trail. We were given a speed restriction of 210 KTS while the B777 was given a speed restriction of 180 KTS. Noticing we were overtaking the B777 I asked the first officer to inquire about a speed reduction for us. Before he could ask ATC for the reduction we were cleared for the visual approach. I immediately configured the aircraft for final approach speed. This did not provide enough separation to avoid the wake turbulence.
Original NASA ASRS Text
Title: An SF340B Captain reported encountering wake vortex from a preceding B777 on approach to IAD that resulted in an uncommanded 25 degree left bank. A go-around was executed.
Narrative: During a visual approach to IAD Runway 19L we encountered wake turbulence about 100 FT AGL. This wake turbulence caused an uncommanded 25 degree left bank. We immediately executed a go-around and made our return via Approach vectors to conduct a visual approach to 19L. We landed and returned to the gate without further incident. Potomac Approach had vectored us to follow a B777 at 5 miles in trail. We were given a speed restriction of 210 KTS while the B777 was given a speed restriction of 180 KTS. Noticing we were overtaking the B777 I asked the First Officer to inquire about a speed reduction for us. Before he could ask ATC for the reduction we were cleared for the visual approach. I immediately configured the aircraft for final approach speed. This did not provide enough separation to avoid the wake turbulence.
Data retrieved from NASA's ASRS site as of July 2013 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.