ZID supervisor controller observed possible operational error near FL220 with 2 en route aircraft.

Attributes
ACN	631774
Time
Date	200409
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : zid.artcc
State Reference	IN
Altitude	msl bound lower : 22000 msl bound upper : 22700
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zid.artcc tracon : vps.tracon
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 200 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar oversight : supervisor
Qualification	controller : radar
Experience	controller radar : 18
ASRS Report	631774
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 16200 vertical : 700
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working the controller in charge position when I received a call from the operational manager in charge inquiring about an adep alert at the mie radar sector between air carrier X and air carrier Y. I went to the sector and asked the radar controller about the 2 aircraft. He advised me that he either missed a readback from air carrier Y or air carrier Y busted his altitude. Air carrier X was wbound at FL230, air carrier Y was northbound assigned a climb to FL220. When I reached the sector, air carrier X was at FL230, air carrier Y was at FL227. I advised the operational manager in charge that we may have had an operational error and had the mie radar controller relieved from position.

Original NASA ASRS Text

Title: ZID SUPVR CTLR OBSERVED POSSIBLE OPERROR NEAR FL220 WITH 2 ENRTE ACFT.

Narrative: I WAS WORKING THE CTLR IN CHARGE POS WHEN I RECEIVED A CALL FROM THE OPERATIONAL MGR IN CHARGE INQUIRING ABOUT AN ADEP ALERT AT THE MIE RADAR SECTOR BTWN ACR X AND ACR Y. I WENT TO THE SECTOR AND ASKED THE RADAR CTLR ABOUT THE 2 ACFT. HE ADVISED ME THAT HE EITHER MISSED A READBACK FROM ACR Y OR ACR Y BUSTED HIS ALT. ACR X WAS WBOUND AT FL230, ACR Y WAS NBOUND ASSIGNED A CLB TO FL220. WHEN I REACHED THE SECTOR, ACR X WAS AT FL230, ACR Y WAS AT FL227. I ADVISED THE OPERATIONAL MGR IN CHARGE THAT WE MAY HAVE HAD AN OPERROR AND HAD THE MIE RADAR CTLR RELIEVED FROM POS.

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.