B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Total 24000; Flight Crew Type 7943
Situational Awareness
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Wake Vortex Encounter; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Procedure; Environment - Non Weather Related; Human Factors
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!
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.