B737-800
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 240; Flight Crew Type 400
Situational Awareness
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
Departing LAX on the LADYJ 4 SID; I was the FO; PF (First Officer; Pilot Flying). As a relatively new First Officer; I was unfamiliar with LAX. Due to time constraints from an unscheduled aircraft swap; the Captain rushed through the briefing and did not give me an opportunity to brief the departure. I interjected to discuss a separate issue with the departure; an 'at or below' versus MCP selected altitude; which was resolved; but I did not adequately brief the entire procedure to include the 'MAINTAIN 250 UNTIL ADVISED' note. This constraint was not in the FMC.Climbing through 13;000 feet; (CMD B engaged); ATC queried our speed; which was 305 KIAS. As the Captain/PM (Pilot Monitoring) responded to the query; he simultaneously selected LVL CHG on the MCP and yanked back on the thrust levers. I was immediately confused as to who was flying the aircraft; if he was taking the aircraft or if I was still flying. I did not understand why he did not ask or direct me to make the change as PF. The situation was resolved and we continued to [our destination] uneventfully.An adequate Departure Briefing is mandatory. As the FO; I should have been more assertive in requiring us to slow down and properly brief the procedure. This would have eliminated the speed error after departure. To mitigate confusion during flight; I believe positive exchange of flight controls should always be used. Any time saved in correcting this speed error by the Captain manipulating the MCP was; I believe; negligible.
B737-800 First Officer reported an inadequate pre-departure briefing led to an airspeed deviation departing LAX.