B767 crew reduced speed to 250 KTS at 10000 ft. The ZAU controller had assigned them 300 KTS.

Attributes
ACN	512630
Time
Date	200105
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : story
State Reference	IL
Altitude	msl single value : 10000
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Flight Phase	descent : intermediate altitude
Route In Use	arrival : profile descent
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	512630
Events
Anomaly	non adherence : clearance non adherence : company policies non adherence : far non adherence : published procedure other anomaly
Resolutory Action	controller : issued advisory other
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Speed assignment. Asked what our speed was by ord approach. Replied 250 KTS. Approach said we had been assigned 300 KTS by center. We thought we were supposed to slow to 250 KTS at story.

Original NASA ASRS Text

Title: B767 CREW REDUCED SPD TO 250 KTS AT 10000 FT. THE ZAU CTLR HAD ASSIGNED THEM 300 KTS.

Narrative: SPD ASSIGNMENT. ASKED WHAT OUR SPD WAS BY ORD APCH. REPLIED 250 KTS. APCH SAID WE HAD BEEN ASSIGNED 300 KTS BY CTR. WE THOUGHT WE WERE SUPPOSED TO SLOW TO 250 KTS AT STORY.

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.