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B737 captain reported failure to make a crossing restriction on arrival into lax when they encountered turbulence or possible wake vortex in the descent in trail of a B767.
| Attributes | |
| ACN | 1559556 |
| Time | |
| Date | 201807 |
| Place | |
| Locale Reference | LAX.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 | Descent |
| Route In Use | Vectors STAR IRNMN2 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Total 24000 Flight Crew Type 7943 |
| Events | |
| Anomaly | Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence |
Narrative:
Lax ATC gave us numerous speed reductions; modifications; and radar vectoring on IRNMN2 arrival. Weather clear and we were behind a heavy B767 getting bounced around when ATC gave us speed reductions and assigned alt 9000 ft. At bayst. Planes don't go down and slow down very well! Speed brake out; now we're 500 ft. High on path. Was focused on altitude and should have just said unable due to ATC restrictions! Thought I could make it happen syndrome. I believe missed it by 300-400 ft. Wish I had just called ATC and said unable!
Original NASA ASRS Text
Title: B737 Captain reported failure to make a crossing restriction on arrival into LAX when they encountered turbulence or possible wake vortex in the descent in trail of a B767.
Narrative: LAX ATC gave us numerous speed reductions; modifications; and radar vectoring on IRNMN2 arrival. Weather clear and we were behind a heavy B767 getting bounced around when ATC gave us speed reductions and assigned alt 9000 ft. at BAYST. Planes don't go down and slow down very well! Speed brake out; now we're 500 ft. high on path. Was focused on altitude and should have just said unable due to ATC restrictions! Thought I could make it happen syndrome. I believe missed it by 300-400 ft. Wish I had just called ATC and said unable!
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.