B757 crew had speed deviation in A90 class B.

Attributes
ACN	490520
Time
Date	200010
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bos.airport
State Reference	MA
Altitude	msl single value : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : a90.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 4r other
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 25000 flight time type : 50
ASRS Report	490520
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other controllera
Resolutory Action	controller : issued alert flight crew : returned to original clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Understood to hold 170 KTS to nabbo and slowed to approach speed 140 KTS and controller said he wanted 170 KTS to miltt. We increased speed to miltt. No apparent conflict.

Original NASA ASRS Text

Title: B757 CREW HAD SPD DEV IN A90 CLASS B.

Narrative: UNDERSTOOD TO HOLD 170 KTS TO NABBO AND SLOWED TO APCH SPD 140 KTS AND CTLR SAID HE WANTED 170 KTS TO MILTT. WE INCREASED SPD TO MILTT. NO APPARENT CONFLICT.

Data retrieved from NASA's ASRS site as of July 2007 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.