An aircraft passed behind another aircraft with less than standard separation.

Attributes
ACN	151662
Time
Date	199007
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mmj airport : pit
State Reference	PA
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pit
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Small Transport
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	151662
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other other : unspecified atc
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 15000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Radar training was in progress and the developmental took a handoff on small transport X descending to 500'. The small transport X appeared to be on a heading to go behind small transport Y at 5000'. The radar developmental took action to ensure sep and exchanged traffic. I was later informed that standard sep was not maintained.

Original NASA ASRS Text

Title: AN ACFT PASSED BEHIND ANOTHER ACFT WITH LESS THAN STANDARD SEPARATION.

Narrative: RADAR TRNING WAS IN PROGRESS AND THE DEVELOPMENTAL TOOK A HDOF ON SMT X DSNDING TO 500'. THE SMT X APPEARED TO BE ON A HDG TO GO BEHIND SMT Y AT 5000'. THE RADAR DEVELOPMENTAL TOOK ACTION TO ENSURE SEP AND EXCHANGED TFC. I WAS LATER INFORMED THAT STANDARD SEP WAS NOT MAINTAINED.

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.