B757 flight crew reported getting a momentary stick shaker when the speed window opened at level off...

Attributes
ACN	1257611
Time
Date	201504
Local Time Of Day	1201-1800
Place
Locale Reference	N90.TRACON
State Reference	NY
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Flight Phase	Climb
Person 1
Function	Pilot Flying Captain
Experience	Flight Crew Last 90 Days 110 Flight Crew Total 29000 Flight Crew Type 7000
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 163 Flight Crew Total 8350 Flight Crew Type 1787
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Speed All Types Deviation - Track / Heading All Types Inflight Event / Encounter Weather / Turbulence

Narrative:

For our departure from ewr we were given runway 4L with the newark one departure. While climbing to our initial altitude of 3;000 feet there was moderate turbulance. ATC gave us an assigned heading which required a left turn. Prior to reaching our 3;000 foot level off altitude and still in the turn we were retracting flaps. At this time we got a momentary stick shaker activation. Corrective action was taken immediately. During this time ATC was giving further climb instructions which I did not comply with immediately. We were given the instructions again for the turn and climb and did comply once the speed was increased to normal. The rest of the flight was uneventful. I think what caused the problem was an early altitude capture causing the window to open and the throttle to retard.

Original NASA ASRS Text

Title: B757 flight crew reported getting a momentary stick shaker when the speed window opened at level off; causing the autothrottles to retard for the slower commanded speed.

Narrative: For our departure from EWR we were given runway 4L with the Newark one departure. While climbing to our initial altitude of 3;000 feet there was moderate turbulance. ATC gave us an assigned heading which required a left turn. Prior to reaching our 3;000 foot level off altitude and still in the turn we were retracting flaps. At this time we got a momentary stick shaker activation. Corrective action was taken immediately. During this time ATC was giving further climb instructions which I did not comply with immediately. We were given the instructions again for the turn and climb and did comply once the speed was increased to normal. The rest of the flight was uneventful. I think what caused the problem was an early altitude capture causing the window to open and the throttle to retard.

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.