Flight crew believed they had received clearance to descend to 3000', read back same and began descent. Approach controller advised he had issued clearance to descend to 5000'.

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Attributes
ACN	116984
Time
Date	198907
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 3000 msl bound upper : 5000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach descent other
Route In Use	arrival other enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 7500
ASRS Report	116984
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation

Narrative:

Cleared to descend to 3000' by approach control. Read back 3000'. Upon level at 3000' and following vectors for approach, we were advised that clearance was to 5000'. Approach control indicated no problem with the misunderstood clearance.

Original NASA ASRS Text

Title: FLT CREW BELIEVED THEY HAD RECEIVED CLRNC TO DESCEND TO 3000', READ BACK SAME AND BEGAN DESCENT. APCH CTLR ADVISED HE HAD ISSUED CLRNC TO DESCEND TO 5000'.

Narrative: CLRED TO DSND TO 3000' BY APCH CTL. READ BACK 3000'. UPON LEVEL AT 3000' AND FOLLOWING VECTORS FOR APCH, WE WERE ADVISED THAT CLRNC WAS TO 5000'. APCH CTL INDICATED NO PROBLEM WITH THE MISUNDERSTOOD CLRNC.

Data retrieved from NASA's ASRS site as of August 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.