Air carrier Y climb through occupied altitude had less than standard separation from cpr X. System e...

Attributes
ACN	266925
Time
Date	199403
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : cxr
State Reference	OH
Altitude	msl bound lower : 17000 msl bound upper : 17700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	Beechjet 400
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 5
ASRS Report	266925
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 25200 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I had just relieved a controller at the youngstown sector at cle ARTCC. My first clearance was to turn cpr X (BE40) to a 020 degree heading to avoid 3 inbound aircraft descending over cxr VOR. I amended X altitude to FL180 in order to maintain vertical separation with air carrier Y (B727) which was climbing nebound. I subsequently stopped X at altitude 17000 ft because Y was climbing so slow. 15 seconds later vertical separation was lost with Y climbing through 17700 ft and X level at 17000 ft and 4.2 laterally.

Original NASA ASRS Text

Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM CPR X. SYS ERROR.

Narrative: I HAD JUST RELIEVED A CTLR AT THE YOUNGSTOWN SECTOR AT CLE ARTCC. MY FIRST CLRNC WAS TO TURN CPR X (BE40) TO A 020 DEG HDG TO AVOID 3 INBOUND ACFT DSNDING OVER CXR VOR. I AMENDED X ALT TO FL180 IN ORDER TO MAINTAIN VERT SEPARATION WITH ACR Y (B727) WHICH WAS CLBING NEBOUND. I SUBSEQUENTLY STOPPED X AT ALT 17000 FT BECAUSE Y WAS CLBING SO SLOW. 15 SECONDS LATER VERT SEPARATION WAS LOST WITH Y CLBING THROUGH 17700 FT AND X LEVEL AT 17000 FT AND 4.2 LATERALLY.

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.

Air carrier Y climb through occupied altitude had less than standard separation from cpr X. System error.