ZDC controller cleared an aircraft to an occupied altitude.

Attributes
ACN	705266
Time
Date	200608
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : ric.vortac
State Reference	VA
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	B717
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 radar : 2 controller time certified in position2 : 6
ASRS Report	705266
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 new clearance controller : issued alert
Consequence	faa : investigated
Miss Distance	horizontal : 6600 vertical : 700
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

I inadvertently cleared the B712 to the altitude that the regional jet was at.

Original NASA ASRS Text

Title: ZDC CTLR CLRED AN ACFT TO AN OCCUPIED ALT.

Narrative: I INADVERTENTLY CLRED THE B712 TO THE ALT THAT THE REGIONAL JET WAS AT.

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.