Crew descended 500 ft below cleared altitude in cle class B airspace.

Attributes
ACN	470030
Time
Date	200003
Day	Mon
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : cle.airport
State Reference	OH
Altitude	msl bound lower : 6500 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cle.tracon
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 180 flight time total : 9500 flight time type : 700
ASRS Report	470030
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : far non adherence : company policies non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued alert flight crew : returned to assigned altitude
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach, ATC put us in a crosswind position crossing over the departure end of runway 23R at cle. We thought we heard an altimeter setting of 29.94 when it really was 29.44. With the altitude at 29.94 we were 500 ft lower than where we should have been. ATC questioned us about our assigned altitude of 7000 ft and said he showed us at 6500 ft. He then pointed out traffic at 10 O'clock that was departing runway 23R and was to level at 6000 ft. We advised traffic in sight and corrected our altimeter and altitude. We then completed the approach and landed.

Original NASA ASRS Text

Title: CREW DSNDED 500 FT BELOW CLRED ALT IN CLE CLASS B AIRSPACE.

Narrative: ON APCH, ATC PUT US IN A XWIND POS XING OVER THE DEP END OF RWY 23R AT CLE. WE THOUGHT WE HEARD AN ALTIMETER SETTING OF 29.94 WHEN IT REALLY WAS 29.44. WITH THE ALT AT 29.94 WE WERE 500 FT LOWER THAN WHERE WE SHOULD HAVE BEEN. ATC QUESTIONED US ABOUT OUR ASSIGNED ALT OF 7000 FT AND SAID HE SHOWED US AT 6500 FT. HE THEN POINTED OUT TFC AT 10 O'CLOCK THAT WAS DEPARTING RWY 23R AND WAS TO LEVEL AT 6000 FT. WE ADVISED TFC IN SIGHT AND CORRECTED OUR ALTIMETER AND ALT. WE THEN COMPLETED THE APCH AND LANDED.

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.