ZOB controller experienced loss of separation because of pilot deviation at FL330.

Attributes
ACN	627125
Time
Date	200407
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : cxr.vor
State Reference	OH
Altitude	msl single value : 33000
Environment
Flight Conditions	IMC
Light	Daylight
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 Plan	IFR
Aircraft 2
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	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 11
ASRS Report	627125
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert
Consequence	faa : investigated
Miss Distance	horizontal : 22200 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X and air carrier Y were on somewhat parallel headings for spacing and traffic respectively. Air carrier X was cleared direct slt and air carrier Y was cleared direct etg, diverging rtes. With approximately 8 mi lateral separation I commended air carrier Y for a 'nice job,' to which he replied 'sure thing.' after addressing other sector priorities and 30-40 seconds elapsing, I observed air carrier Y drifting north of his route direct etg. I questioned him as to whether or not he was established direct etg, and his response indicated that he was making a course adjustment and 'that should look better.'

Original NASA ASRS Text

Title: ZOB CTLR EXPERIENCED LOSS OF SEPARATION BECAUSE OF PLTDEV AT FL330.

Narrative: ACR X AND ACR Y WERE ON SOMEWHAT PARALLEL HDGS FOR SPACING AND TFC RESPECTIVELY. ACR X WAS CLRED DIRECT SLT AND ACR Y WAS CLRED DIRECT ETG, DIVERGING RTES. WITH APPROX 8 MI LATERAL SEPARATION I COMMENDED ACR Y FOR A 'NICE JOB,' TO WHICH HE REPLIED 'SURE THING.' AFTER ADDRESSING OTHER SECTOR PRIORITIES AND 30-40 SECONDS ELAPSING, I OBSERVED ACR Y DRIFTING N OF HIS RTE DIRECT ETG. I QUESTIONED HIM AS TO WHETHER OR NOT HE WAS ESTABLISHED DIRECT ETG, AND HIS RESPONSE INDICATED THAT HE WAS MAKING A COURSE ADJUSTMENT AND 'THAT SHOULD LOOK BETTER.'

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.