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B737 flight crew experienced wake turbulence on arrival to sfo following an A319. They took evasive action and missed a crossing restriction as a result.
| Attributes | |
| ACN | 1051249 |
| Time | |
| Date | 201211 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | SFO.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Route In Use | Other Quiet Bridge Visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Total 15000 Flight Crew Type 800 |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
[We were] cleared FMS bridge visual into san francisco; runway 28R. Approximately 7;000 ft began experiencing significant wake turbulence such that I disconnected autopilot and offset right of course and began slowing to achieve greater separation from preceding aircraft. To complicate matters we were assigned 250 KTS which is problematic and has a tendency to lead to an unstable approach. So rather than being high and fast I offset and reduced airspeed and tried to drop down to get out of the wake. Unfortunately I went below the 6;000 ft altitude restriction. We advised ATC that we were experiencing wake turbulence and that we were slowing and offsetting. The controller sounded very skeptical stating that the other aircraft was an airbus 319. We reiterated and he assigned us the offset and 180 KTS to the marker.
Original NASA ASRS Text
Title: B737 flight crew experienced wake turbulence on arrival to SFO following an A319. They took evasive action and missed a crossing restriction as a result.
Narrative: [We were] cleared FMS Bridge Visual into San Francisco; Runway 28R. Approximately 7;000 FT began experiencing significant wake turbulence such that I disconnected autopilot and offset right of course and began slowing to achieve greater separation from preceding aircraft. To complicate matters we were assigned 250 KTS which is problematic and has a tendency to lead to an unstable approach. So rather than being high and fast I offset and reduced airspeed and tried to drop down to get out of the wake. Unfortunately I went below the 6;000 FT altitude restriction. We advised ATC that we were experiencing wake turbulence and that we were slowing and offsetting. The Controller sounded very skeptical stating that the other aircraft was an Airbus 319. We reiterated and he assigned us the offset and 180 KTS to the marker.
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.