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An aircraft initiated a go-around due to a wind shear alert in the cockpit. The reporter thinks it may have been wake turbulence generated by a preceding B737-900.
| Attributes | |
| ACN | 1337257 |
| Time | |
| Date | 201603 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B737-900 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 16 |
| Events | |
| Anomaly | Inflight Event / Encounter Unstabilized Approach Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
Aircraft X was in-trail of a B737-900 who had just gone around. About a 2.5 mile final; I observed aircraft X climbing out of 1200 feet and they stated they were going around for a wind shear alert on board the aircraft. I gave standard missed approach procedure and shipped them to departure control. I advised the next three or four arrivals and the single departure I had about the report and all others stated the wind was calm and they had no encounter. When aircraft X came back around; I explained to them that they were behind a B737-900 that had gone around; and I suspected that they had encountered wake turbulence from this aircraft; as we have heard the newer generation of aircraft can have quite a nasty wake turbulence generated from the efficient wing. They acknowledged and landing having encountered no wind at all on final.I could only recommend that when I advised them the preceding arrival went around; I would have reiterated that it was a B737-900; however; this may have meant not a thing to the pilot upon receipt. I just don't know what information they are being provided regarding aircraft wake anymore.
Original NASA ASRS Text
Title: An aircraft initiated a go-around due to a wind shear alert in the cockpit. The reporter thinks it may have been Wake Turbulence generated by a preceding B737-900.
Narrative: Aircraft X was in-trail of a B737-900 who had just gone around. About a 2.5 mile final; I observed Aircraft X climbing out of 1200 feet and they stated they were going around for a wind shear alert on board the aircraft. I gave standard missed approach procedure and shipped them to departure control. I advised the next three or four arrivals and the single departure I had about the report and all others stated the wind was calm and they had no encounter. When Aircraft X came back around; I explained to them that they were behind a B737-900 that had gone around; and I suspected that they had encountered wake turbulence from this aircraft; as we have heard the newer generation of aircraft can have quite a nasty wake turbulence generated from the efficient wing. They acknowledged and landing having encountered no wind at all on final.I could only recommend that when I advised them the preceding arrival went around; I would have reiterated that it was a B737-900; however; this may have meant not a thing to the pilot upon receipt. I just don't know what information they are being provided regarding aircraft wake anymore.
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.