Flight Crew Total 8000
Deviation - Speed All Types; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Wake Vortex Encounter
General Maintenance Action
Environment - Non Weather Related
On visual approach to Runway 9; 15 flaps were lowered below the flaps 15 limit speed and confirmed in cockpit between pilots. Near that time; the aircraft hit turbulence or the wake of the preceding B777. During extension or shortly thereafter; the aircraft speed jumped up then returned to normal deceleration of speed. This momentary speed increase lasted only a few seconds. Because the speed increase happened so fast; neither of us were certain if the flaps limitation was exceeded. After landing; we pulled up a flap report and printout showed 203 KTS for flaps 15. Flap overspeed was entered in logbook; Maintenance deferred inspection to next 100 hour check.
[Report narrative contained no additional information.]
B737-800 flight crew reported encountering possible wake turbulence in trail of a B777 on approach to MIA that resulted in a flap overspeed.