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B737-700 flight crew reported overshooting a crossing restriction on arrival into lax when they were distracted by a wake turbulence encounter.
| Attributes | |
| ACN | 1537150 |
| Time | |
| Date | 201804 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | LAX.Airport |
| State Reference | CA |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Route In Use | STAR IRNMN ONE |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | Descent |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 383 |
| Person 2 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter Wake Vortex Encounter |
Narrative:
On the irnmn 1 arrival into lax; we encountered wake turbulence; which caused the autopilot to revert to control wheel pitch. There was some difficulty getting the aircraft back into VNAV path. This distraction resulted in us being about 900 feet low on our crossing restriction at the juuse intersection. No traffic conflict occurred and ATC did not say anything regarding our altitude.
Original NASA ASRS Text
Title: B737-700 flight crew reported overshooting a crossing restriction on arrival into LAX when they were distracted by a wake turbulence encounter.
Narrative: On the IRNMN 1 Arrival into LAX; we encountered wake turbulence; which caused the autopilot to revert to control wheel pitch. There was some difficulty getting the aircraft back into VNAV PATH. This distraction resulted in us being about 900 feet low on our crossing restriction at the JUUSE intersection. No traffic conflict occurred and ATC did not say anything regarding our altitude.
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.