Medium large transport conflicted with an small transport resulting in a loss of separation.

Attributes
ACN	110166
Time
Date	198905
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bwi
State Reference	MD
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	110166
Person 2
Affiliation	company : air carrier
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	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 12000 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

1) what happened: system deviation which resulted in loss of sep of 2 IFR aircraft. 2) how was problem discovered: only when the audio visibility C/a went off. 3) what actions were taken: the aircraft on my frequency was given instructions to descend below the conflicting aircraft's altitude. 4) evasive action: none. 5) factors contributing: a) the sector in which sep was lost is seldom open. B) the aircraft on my frequency was on the wrong beacon code, therefore no altitude information was available C) ZNY put the aircraft on a route and altitude that was not conforming to our letter of agreement. 6) why do I believe situation occurred?: ZNY controller did not know his or her airspace. 7) suggestion to prevent: we at bwi work too many sectors in too many configns. ZNY is not familiar with our procedures. Our automation needs to be improved.

Original NASA ASRS Text

Title: MLG CONFLICTED WITH AN SMT RESULTING IN A LOSS OF SEPARATION.

Narrative: 1) WHAT HAPPENED: SYS DEVIATION WHICH RESULTED IN LOSS OF SEP OF 2 IFR ACFT. 2) HOW WAS PROB DISCOVERED: ONLY WHEN THE AUDIO VIS C/A WENT OFF. 3) WHAT ACTIONS WERE TAKEN: THE ACFT ON MY FREQ WAS GIVEN INSTRUCTIONS TO DSND BELOW THE CONFLICTING ACFT'S ALT. 4) EVASIVE ACTION: NONE. 5) FACTORS CONTRIBUTING: A) THE SECTOR IN WHICH SEP WAS LOST IS SELDOM OPEN. B) THE ACFT ON MY FREQ WAS ON THE WRONG BEACON CODE, THEREFORE NO ALT INFO WAS AVAILABLE C) ZNY PUT THE ACFT ON A ROUTE AND ALT THAT WAS NOT CONFORMING TO OUR LETTER OF AGREEMENT. 6) WHY DO I BELIEVE SITUATION OCCURRED?: ZNY CTLR DID NOT KNOW HIS OR HER AIRSPACE. 7) SUGGESTION TO PREVENT: WE AT BWI WORK TOO MANY SECTORS IN TOO MANY CONFIGNS. ZNY IS NOT FAMILIAR WITH OUR PROCS. OUR AUTOMATION NEEDS TO BE IMPROVED.

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.