ZOB controller experienced operational error at 17000 ft when incorrect clearance readback was not r...

Attributes
ACN	643927
Time
Date	200501
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : svm.vortac
State Reference	MI
Altitude	msl single value : 17000
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zob.artcc
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar pilot : instrument
Experience	controller time certified in position1 : 4 flight time total : 250
ASRS Report	643927
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other spatial deviation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance
Consequence	faa : investigated
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Working air carrier X and aircraft Y on different frequency. Air carrier X took 2 clrncs that were issued to aircraft Y and was warned twice to be careful. The third time; air carrier X took a clearance to fly heading of 360 degrees that was issued to aircraft Y. The readback error was not caught. When the track was observed about 30 seconds later; corrective actions were taken and a pilot deviation was filed.

Original NASA ASRS Text

Title: ZOB CTLR EXPERIENCED OPERROR AT 17000 FT WHEN INCORRECT CLRNC READBACK WAS NOT RECOGNIZED.

Narrative: WORKING ACR X AND ACFT Y ON DIFFERENT FREQ. ACR X TOOK 2 CLRNCS THAT WERE ISSUED TO ACFT Y AND WAS WARNED TWICE TO BE CAREFUL. THE THIRD TIME; ACR X TOOK A CLRNC TO FLY HDG OF 360 DEGS THAT WAS ISSUED TO ACFT Y. THE READBACK ERROR WAS NOT CAUGHT. WHEN THE TRACK WAS OBSERVED ABOUT 30 SECONDS LATER; CORRECTIVE ACTIONS WERE TAKEN AND A PLTDEV WAS FILED.

Data retrieved from NASA's ASRS site as of January 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.

ZOB controller experienced operational error at 17000 ft when incorrect clearance readback was not recognized.