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

Attributes
ACN	286499
Time
Date	199410
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : tys
State Reference	TN
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tys tower : tys
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	oversight : coordinator
Qualification	controller : radar
Experience	controller radar : 2
ASRS Report	286499
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

I was working radar data. I signed off and was about to unplug when local control called to coordinate a right turn for air carrier X after obtaining heading 340 degrees with a hold down restr of 4000 ft. I coordinated this with local control. Aircraft 'stepped on' his readback but he repeated his initials. I unplugged and went to lunch. Upon returning, I learned that X did not receive the 4000 ft restr and came within less than standard separation with Y. I did not witness the deviation. Upon reviewing the tape, the local controller later confirmed the heading (because it appeared to be in conflict with Y, I suggest). The radar controller confirmed the heading but did not reiterate the altitude restr. X did not check on until out of 5000 ft, giving the radar controller no chance to rectify the situation.

Original NASA ASRS Text

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

Narrative: I WAS WORKING RADAR DATA. I SIGNED OFF AND WAS ABOUT TO UNPLUG WHEN LCL CTL CALLED TO COORDINATE A R TURN FOR ACR X AFTER OBTAINING HDG 340 DEGS WITH A HOLD DOWN RESTR OF 4000 FT. I COORDINATED THIS WITH LCL CTL. ACFT 'STEPPED ON' HIS READBACK BUT HE REPEATED HIS INITIALS. I UNPLUGGED AND WENT TO LUNCH. UPON RETURNING, I LEARNED THAT X DID NOT RECEIVE THE 4000 FT RESTR AND CAME WITHIN LTSS WITH Y. I DID NOT WITNESS THE DEV. UPON REVIEWING THE TAPE, THE LCL CTLR LATER CONFIRMED THE HDG (BECAUSE IT APPEARED TO BE IN CONFLICT WITH Y, I SUGGEST). THE RADAR CTLR CONFIRMED THE HDG BUT DID NOT REITERATE THE ALT RESTR. X DID NOT CHK ON UNTIL OUT OF 5000 FT, GIVING THE RADAR CTLR NO CHANCE TO RECTIFY THE SIT.

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.