ARTCC radar controller did not adhere to letter of agreement, stopped large transport climb while in pit approach airspace and had less than ARTCC radar separation. System deviation error.

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Attributes
ACN	96871
Time
Date	198810
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pit airport : hlg
State Reference	PA
Altitude	msl bound lower : 10000 msl bound upper : 10200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob tracon : pit
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
ASRS Report	96871
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	other
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Operational Deviation Inter Facility Coordination Failure

Narrative:

Large transport X wbound off pit on mmj 274 instructed to climb to 14000' by pit departure control. Light transport Y off hlg airport being vectored behind large transport X to follow same flight path, climbed to 10000' to stay below large transport X. Large transport X switched to cle ARTCC and light transport Y was on departure control. ZOB stopped large transport X at 10000' west/O coordination and then called to say they did it. Aircraft were 6 mi apart and departure control turned light transport Y eastbound to make sure no deterioration in latitude sep occurred. Large transport X should have been climbing above light transport Y. Altitude on large transport X was observed at 10200' at one point. Cle ARTCC advised they had less than their 5 mi, but light transport Y aircraft was on pit departure control and was not observed closer than 3 mi.

Original NASA ASRS Text

Title: ARTCC RADAR CTLR DID NOT ADHERE TO LETTER OF AGREEMENT, STOPPED LGT CLIMB WHILE IN PIT APCH AIRSPACE AND HAD LESS THAN ARTCC RADAR SEPARATION. SYSTEM DEVIATION ERROR.

Narrative: LGT X WBOUND OFF PIT ON MMJ 274 INSTRUCTED TO CLB TO 14000' BY PIT DEP CTL. LTT Y OFF HLG ARPT BEING VECTORED BEHIND LGT X TO FOLLOW SAME FLT PATH, CLBED TO 10000' TO STAY BELOW LGT X. LGT X SWITCHED TO CLE ARTCC AND LTT Y WAS ON DEP CTL. ZOB STOPPED LGT X AT 10000' W/O COORD AND THEN CALLED TO SAY THEY DID IT. ACFT WERE 6 MI APART AND DEP CTL TURNED LTT Y EBND TO MAKE SURE NO DETERIORATION IN LAT SEP OCCURRED. LGT X SHOULD HAVE BEEN CLBING ABOVE LTT Y. ALT ON LGT X WAS OBSERVED AT 10200' AT ONE POINT. CLE ARTCC ADVISED THEY HAD LESS THAN THEIR 5 MI, BUT LTT Y ACFT WAS ON PIT DEP CTL AND WAS NOT OBSERVED CLOSER THAN 3 MI.

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.