B737 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 562
Workload; Time Pressure
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC complied w / Automation / Advisory
Human Factors; Procedure
We were on the Arrival into ATL. [On with Approach Control]; were given descent to 10;000 feet abeam EAGYL; and speed 210; between EAGYL and SHURT a descent to 7;000 feet; abeam SHURT we were given a descent to 3;000 feet; then told 'expedite to 3;000 feet; expect short final.' We started expediting down and asked Approach our sequence; they said 'you're number two and following a Air Carrier Y.' The Air Carrier Y was base to final and about eight to ten miles away from our position; we were on downwind. We continued down and configuring the aircraft; the Captain was flying and slowed down; I never challenged the speed and we both misunderstood the 'expedite down' instruction and expect short final with a speed relief.Shortly after; we were given a vector to heading 360. Then Approach called 'say speed;' we did say speed and explained; since it was a short final and the 757 had passed opposite direction our 9 o'clock; we understood we had to slow down. Approach said 'speed 180;' we increased speed to 180; Approach then said 'turn left heading 300; maintain 180 to JUBBA; clear Visual Approach Runway XX.' Then the Controller called 'say speed again' I replied; speed 180. He then said 'Clear visual; call Tower at JUBBA;' keep in mind between the slowed down speed of about 160 to increasing to 180 we approached the 757 to a distance of about three miles once given the turn to final.Once on the ground; Tower gave us taxi via [route]; and gave us a number to call for possible deviation. The Captain called; spoke to a Controller; explained what we understood; and then the Controller explained some things to the Captain. After the call the Captain explained to me what they spoke about; and told me that the Controller said 'No Deviation' just information for the future.
B737-700 First Officer reported deviating from assigned airspeed on approach.