Air carrier Y climbed through altitude occupied by small aircraft X in front of him.

Attributes
ACN	108878
Time
Date	198904
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : rdu
State Reference	NC
Altitude	msl bound lower : 21000 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	108878
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument
Events
Anomaly	altitude deviation : overshoot conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Small aircraft X was eastbound at FL210 and air carrier Y was eastbound climbing to FL230. I switched air carrier Y to the high altitude. Air carrier Y then overtook small aircraft X and standard sep was lost about 30 mi southwest of rdu.

Original NASA ASRS Text

Title: ACR Y CLIMBED THROUGH ALT OCCUPIED BY SMA X IN FRONT OF HIM.

Narrative: SMA X WAS EBND AT FL210 AND ACR Y WAS EBND CLBING TO FL230. I SWITCHED ACR Y TO THE HIGH ALT. ACR Y THEN OVERTOOK SMA X AND STANDARD SEP WAS LOST ABOUT 30 MI SW OF RDU.

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