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B737-700 first officer reported 'moderate and greater' wake turbulence in trail of an emb-170 and an A340. Captain turned off course to minimize the wake effect and they deviated from the assigned track.
| Attributes | |
| ACN | 1164402 |
| Time | |
| Date | 201404 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | LAX.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR SADDE |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 295 Flight Crew Type 6000 |
| Events | |
| Anomaly | Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
[We were on the] sadde arrival to lax descending from approximately 12;000 ft to 10;000 ft approaching bayst intersection; encountered moderate and greater wake turbulence. The captain (pilot flying) took the aircraft out of LNAV and used heading sel to offset from procedure track. This resulted in a late turn to the west at bayst. Due to frequency congestion and cockpit workload; this happened before I could coordinate with ATC. Controller said we were behind an emb-170 but the wake was intense. I suspect it was from an A-340 that was ahead of the emb-170.
Original NASA ASRS Text
Title: B737-700 First Officer reported 'moderate and greater' wake turbulence in trail of an EMB-170 and an A340. Captain turned off course to minimize the wake effect and they deviated from the assigned track.
Narrative: [We were on the] SADDE Arrival to LAX descending from approximately 12;000 FT to 10;000 FT approaching BAYST Intersection; encountered moderate and greater wake turbulence. The Captain (pilot flying) took the aircraft out of LNAV and used HDG SEL to offset from procedure track. This resulted in a late turn to the west at BAYST. Due to frequency congestion and cockpit workload; this happened before I could coordinate with ATC. Controller said we were behind an EMB-170 but the wake was intense. I suspect it was from an A-340 that was ahead of the EMB-170.
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.