Commuter light transport altitude deviation overshot during descent.

Attributes
ACN	147715
Time
Date	199006
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 5400 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : uca
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	cruise other descent other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 85 flight time total : 4000
ASRS Report	147715
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : instrument pilot : commercial
Experience	flight time last 90 days : 30 flight time total : 2300 flight time type : 25
ASRS Report	147714
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation Operational Deviation other

Narrative:

On approach into ord copilot and myself (captain) were issued a clearance to descend from 8000' to 4000'. Copilot read back clearance. (No reply from ATC) at 5400' the controller asked our altitude. I replied 5400' for 4000'. Controller said we were assigned 7000'. I told him we read back 4000'. He then issued us a clearance to continue to 3000'. Nothing further was said. After landing I called the controllers to see what they were doing about the occurrence. They said that there was no one else around us and they were not writing up anything on it.

Original NASA ASRS Text

Title: COMMUTER LTT ALT DEVIATION OVERSHOT DURING DESCENT.

Narrative: ON APCH INTO ORD COPLT AND MYSELF (CAPT) WERE ISSUED A CLRNC TO DSND FROM 8000' TO 4000'. COPLT READ BACK CLRNC. (NO REPLY FROM ATC) AT 5400' THE CTLR ASKED OUR ALT. I REPLIED 5400' FOR 4000'. CTLR SAID WE WERE ASSIGNED 7000'. I TOLD HIM WE READ BACK 4000'. HE THEN ISSUED US A CLRNC TO CONTINUE TO 3000'. NOTHING FURTHER WAS SAID. AFTER LNDG I CALLED THE CTLRS TO SEE WHAT THEY WERE DOING ABOUT THE OCCURRENCE. THEY SAID THAT THERE WAS NO ONE ELSE AROUND US AND THEY WERE NOT WRITING UP ANYTHING ON IT.

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.