A320 captain reported a flap overspeed on approach to ewr due to either turbulence or wake vortices.

Attributes
ACN	1412402
Time
Date	201612
Local Time Of Day	1201-1800
Place
Locale Reference	EWR.Airport
State Reference	NJ
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Widebody Transport
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 182
Events
Anomaly	Deviation - Speed All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence

Narrative:

Momentary flap 2 overspeed while on approach [to] 4R ewr. Approximately 3000 ft; 200-205 kts; 2-3 seconds. IMC conditions; hand flown; behind a 'heavy' and trying to slow. Turbulence (wake?) drove airspeed to flap limit momentarily. Flaps retracted; slowed and flaps re-extended on schedule and landed normally. Maintenance write up via ACARS.

Original NASA ASRS Text

Title: A320 Captain reported a flap overspeed on approach to EWR due to either turbulence or wake vortices.

Narrative: Momentary flap 2 overspeed while on approach [to] 4R EWR. Approximately 3000 ft; 200-205 kts; 2-3 seconds. IMC conditions; hand flown; behind a 'heavy' and trying to slow. Turbulence (wake?) drove airspeed to flap limit momentarily. Flaps retracted; slowed and flaps re-extended on schedule and landed normally. Maintenance write up via ACARS.

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.