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C560XL flight crew reported encountering severe wake turbulence on the arrival into lax in trail of a B757 that resulted in a 60 degree bank.
| Attributes | |
| ACN | 1640099 |
| Time | |
| Date | 201904 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | SCT.TRACON |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | Citation Excel (C560XL) |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
While descending via the hlywd 1 RNAV arrival into lax at around 16;000 feet and 280 knots; we encountered severe turbulence. The nose dropped; our right wing dipped approximately 60 degrees and the autopilot shut off. I immediately grabbed the controls and pulled the power back then leveled off. I checked on our one passenger and she was shook up a little but not hurt and in good spirits. The cabin was a mess. You could see multiple seat cushions on the ground; chips and drinks were scattered about as well as the life raft and pillows that were moved. We reported to ATC that we encountered wake turbulence and that we would like to get off of our course. He told us that we were about 8 miles behind a boeing 757 but to stay on our course. I repeated that we wanted to change course due to a wake encounter and he suggested that we could stay above him at 14;000 [feet]. We were happy with that as it would keep us clear of danger. Soon after we were cleared for the ILS 25L behind the 757. We notified approach and then tower that we would need to land long. I hand flew the ILS one dot above the glideslope and landed uneventfully.nothing on our end could have prevented our wake turbulence encounter. We were descending via an arrival as cleared by ATC and didn't even know about the 757 in front of us until we reported to ATC that we hit their wake. We had legal separation from the boeing so it wasn't the fault of ATC either. One thing to note about the hlywd 1 arrival is that the crossing restrictions are not exact altitudes. For example; avatr is between FL240 and FL190; daaay is above 17;000 [feet]; wadup is above 15;000 [feet]. If I descend steeper than the aircraft in front of me; I may have more potential to fly in their wake than if we cross each point at exactly the same altitude. Just a speculation.
Original NASA ASRS Text
Title: C560XL flight crew reported encountering severe wake turbulence on the arrival into LAX in trail of a B757 that resulted in a 60 degree bank.
Narrative: While descending via the HLYWD 1 RNAV arrival into LAX at around 16;000 feet and 280 knots; we encountered severe turbulence. The nose dropped; our right wing dipped approximately 60 degrees and the autopilot shut off. I immediately grabbed the controls and pulled the power back then leveled off. I checked on our one passenger and she was shook up a little but not hurt and in good spirits. The cabin was a mess. You could see multiple seat cushions on the ground; chips and drinks were scattered about as well as the life raft and pillows that were moved. We reported to ATC that we encountered wake turbulence and that we would like to get off of our course. He told us that we were about 8 miles behind a Boeing 757 but to stay on our course. I repeated that we wanted to change course due to a wake encounter and he suggested that we could stay above him at 14;000 [feet]. We were happy with that as it would keep us clear of danger. Soon after we were cleared for the ILS 25L behind the 757. We notified approach and then Tower that we would need to land long. I hand flew the ILS one dot above the glideslope and landed uneventfully.Nothing on our end could have prevented our wake turbulence encounter. We were descending via an arrival as cleared by ATC and didn't even know about the 757 in front of us until we reported to ATC that we hit their wake. We had legal separation from the Boeing so it wasn't the fault of ATC either. One thing to note about the HLYWD 1 arrival is that the crossing restrictions are not exact altitudes. For example; AVATR is between FL240 and FL190; DAAAY is above 17;000 [feet]; WADUP is above 15;000 [feet]. If I descend steeper than the aircraft in front of me; I may have more potential to fly in their wake than if we cross each point at exactly the same altitude. Just a speculation.
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.