ZID controller experienced operational deviation when incorrect altitude descent clearance read back went undetected; resulting in uncoord airspace entry.

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Attributes
ACN	794985
Time
Date	200807
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : cvg.vortac
State Reference	KY
Altitude	msl single value : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 6 controller radar : 5 controller time certified in position1 : 3
ASRS Report	794985
Person 2
Affiliation	government : faa
Function	controller : radar
Experience	controller military : 5 controller non radar : 5 controller radar : 5 controller supervisory : 3
ASRS Report	794986
Events
Anomaly	airspace violation : entry non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera other controllerb
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation

Narrative:

I was working a combined sector radar position during moderate to extreme complexity. I issued a descent clearance to one four thousand; and aircraft read back one one thousand. Supplemental information from acn 794986: air carrier X was assigned 140 and pilot read back 110 and descended into ind approach's airspace.

Original NASA ASRS Text

Title: ZID CTLR EXPERIENCED OPDEV WHEN INCORRECT ALT DESCENT CLRNC READ BACK WENT UNDETECTED; RESULTING IN UNCOORD AIRSPACE ENTRY.

Narrative: I WAS WORKING A COMBINED SECTOR RADAR POS DURING MODERATE TO EXTREME COMPLEXITY. I ISSUED A DSCNT CLRNC TO ONE FOUR THOUSAND; AND ACFT READ BACK ONE ONE THOUSAND. SUPPLEMENTAL INFO FROM ACN 794986: ACR X WAS ASSIGNED 140 AND PLT READ BACK 110 AND DSNDED INTO IND APCH'S AIRSPACE.

Data retrieved from NASA's ASRS site as of May 2009 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.