B737-800 flight crew reported encountering possible wake turbulence in trail of a B777 on approach t...

Attributes
ACN	1202238
Time
Date	201409
Local Time Of Day	1201-1800
Place
Locale Reference	MIA.Airport
State Reference	FL
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying
Experience	Flight Crew Total 8000
Person 2
Function	Pilot Not Flying
Events
Anomaly	Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Wake Vortex Encounter

Narrative:

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.

Original NASA ASRS Text

Title: B737-800 flight crew reported encountering possible wake turbulence in trail of a B777 on approach to MIA that resulted in a flap overspeed.

Narrative: 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.

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.

B737-800 flight crew reported encountering possible wake turbulence in trail of a B777 on approach to mia that resulted in a flap overspeed.