ZDC controller loses situational awareness and climbs B190 through occupied altitude of PA32.

Attributes
ACN	505360
Time
Date	200103
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : bkw.vortac
State Reference	WV
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc.artcc
Operator	general aviation : personal
Make Model Name	PA-32 Cherokee Six/Lance/Saratoga
Operating Under FAR Part	Part 91
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zdc.artcc
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	cruise : level cruise : enroute altitude change
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 19 controller supervisory : 3
ASRS Report	505360
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other other : 969
Miss Distance	horizontal : 24000 vertical : 100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Initially, I didn't climb the B190 passing behind the PA28 and when I got distraction with getting a holding STAR for iad and dca traffic, I forgot about the speeds and climbed the B190 and he passed 4 mi behind the PA32.

Original NASA ASRS Text

Title: ZDC CTLR LOSES SITUATIONAL AWARENESS AND CLBS B190 THROUGH OCCUPIED ALT OF PA32.

Narrative: INITIALLY, I DIDN'T CLB THE B190 PASSING BEHIND THE PA28 AND WHEN I GOT DISTR WITH GETTING A HOLDING STAR FOR IAD AND DCA TFC, I FORGOT ABOUT THE SPDS AND CLBED THE B190 AND HE PASSED 4 MI BEHIND THE PA32.

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.