MD88 aircraft with descent clearance to 10000 ft. Flight crew read back altitude and set it in altitude alert. As aircraft was descending through 10800 ft controller questioned their altitude and said they had been cleared to 11000 ft. Flight crew returned to 11000 ft.

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Attributes
ACN	365830
Time
Date	199704
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : atl
State Reference	GA
Altitude	msl bound lower : 10700 msl bound upper : 11000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star enroute airway : atl
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer observation : company check pilot oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 180 flight time total : 14000 flight time type : 8000
ASRS Report	365830
Person 2
Affiliation	company : air carrier
Function	flight crew : captain instruction : trainee
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 9000 flight time type : 800
ASRS Report	366052
Events
Anomaly	non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other other : unspecified atc
Resolutory Action	other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation other

Narrative:

Arriving atl on rome STAR from over bna. Received clearance from atl approach control to descend to 10000 ft. Both pilots were clear on this and 10000 ft was read back and put in altitude alert window. As we were passing 10800 ft we were queried by approach if we were level at 11000 ft. We immediately stopped the descent, never going below 10700 ft and climbed to 11000 ft. No conflict occurred. From the tone of the controller's voice and her appreciative sound we felt it was an error on her part. We both in the cockpit felt strongly that we had heard and read back 10000 ft.

Original NASA ASRS Text

Title: MD88 ACFT WITH DSCNT CLRNC TO 10000 FT. FLC READ BACK ALT AND SET IT IN ALT ALERT. AS ACFT WAS DSNDING THROUGH 10800 FT CTLR QUESTIONED THEIR ALT AND SAID THEY HAD BEEN CLRED TO 11000 FT. FLC RETURNED TO 11000 FT.

Narrative: ARRIVING ATL ON ROME STAR FROM OVER BNA. RECEIVED CLRNC FROM ATL APCH CTL TO DSND TO 10000 FT. BOTH PLTS WERE CLR ON THIS AND 10000 FT WAS READ BACK AND PUT IN ALT ALERT WINDOW. AS WE WERE PASSING 10800 FT WE WERE QUERIED BY APCH IF WE WERE LEVEL AT 11000 FT. WE IMMEDIATELY STOPPED THE DSCNT, NEVER GOING BELOW 10700 FT AND CLBED TO 11000 FT. NO CONFLICT OCCURRED. FROM THE TONE OF THE CTLR'S VOICE AND HER APPRECIATIVE SOUND WE FELT IT WAS AN ERROR ON HER PART. WE BOTH IN THE COCKPIT FELT STRONGLY THAT WE HAD HEARD AND READ BACK 10000 FT.

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.