ZOB issues descent altitude and misses incorrect readback, resulting in an operational error.

Attributes
ACN	504809
Time
Date	200103
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : syr.airport
State Reference	NY
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Route In Use	enroute airway : j547.airway
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	cruise : enroute altitude change
Route In Use	enroute airway : j547.airway
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar pilot : instrument
Experience	controller radar : 6 controller time certified in position1 : 1 flight time total : 1000
ASRS Report	504809
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : clearance
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 9000 vertical : 700
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I gave an aircraft a crossing restr (30 mi west of syr at 11000 ft) and pilot read back an altitude of 10000 ft. I missed his readback.

Original NASA ASRS Text

Title: ZOB ISSUES DSCNT ALT AND MISSES INCORRECT READBACK, RESULTING IN AN OPERROR.

Narrative: I GAVE AN ACFT A XING RESTR (30 MI W OF SYR AT 11000 FT) AND PLT READ BACK AN ALT OF 10000 FT. I MISSED HIS READBACK.

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.