Poor coordination between data and radar controllers, small transport descended to same altitude as medium large transport with less than standard separation.

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Attributes
ACN	164359
Time
Date	199012
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : pit
State Reference	PA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute airway : zob
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : flight data
Qualification	controller : non radar controller : developmental
Experience	controller non radar : 2
ASRS Report	164359
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	atc equipment other atc equipment : unspecified
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

There were 3 cle inbnds and 1 pit inbound coming into our sector. Buf sector was working the aircraft. I called to get control down on the aircraft and they gave me control for descent with respect to medium large transport X. We had all the associated pvd's on our scope and therefore I didn't see any need to relay to the radar controller that we had control for descent with respect. Subsequently though, he descended an small transport Y to the same altitude as the medium large transport X with 2.5-3.5 mi of latitude sep. To prevent a recurrence of this same type tell the radar man verbatim what was coordinated.

Original NASA ASRS Text

Title: POOR COORD BETWEEN DATA AND RADAR CTLRS, SMT DESCENDED TO SAME ALT AS MLG WITH LESS THAN STANDARD SEPARATION.

Narrative: THERE WERE 3 CLE INBNDS AND 1 PIT INBND COMING INTO OUR SECTOR. BUF SECTOR WAS WORKING THE ACFT. I CALLED TO GET CTL DOWN ON THE ACFT AND THEY GAVE ME CTL FOR DSNT WITH RESPECT TO MLG X. WE HAD ALL THE ASSOCIATED PVD'S ON OUR SCOPE AND THEREFORE I DIDN'T SEE ANY NEED TO RELAY TO THE RADAR CTLR THAT WE HAD CTL FOR DSNT WITH RESPECT. SUBSEQUENTLY THOUGH, HE DSNDED AN SMT Y TO THE SAME ALT AS THE MLG X WITH 2.5-3.5 MI OF LAT SEP. TO PREVENT A RECURRENCE OF THIS SAME TYPE TELL THE RADAR MAN VERBATIM WHAT WAS COORDINATED.

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.