Military Y had less than standard separation from air carrier Z. System error.

Attributes
ACN	218707
Time
Date	199208
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : acy
State Reference	NJ
Altitude	agl bound lower : 200 agl bound upper : 200
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : acy tower : acy
Operator	other
Make Model Name	Fighter
Flight Phase	descent : approach landing : go around
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 3 controller radar : 6
ASRS Report	218707
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 1600 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

I was working the arrival departure sector at acy and had military X, a flight of 2 fgts, inbound from W107. As is usual during IFR WX, the lead asked to be split from his wingman and worked in individually on the ILS 13 approach. I split the aircraft and worked them normally until reaching final. As being the WX was IFR and the LOA between military and acy tower stipulates the aircraft remain on a single frequency until they land, I requested, from acy local controller, landing clearance and arresting cable status (raised/lowered). He issued landing clearance for military X at which time I requested low approach clearance for military Y, which was pre-coordinated and also standard during IFR WX. Local control approved the low approach again. Aircraft was handled normally until 1 mi final at 500 MSL when local control advised that air carrier Z commuter was 'rolling.' I immediately told military Y to 'go around' and to climb and maintain 2000 ft and turn right heading 220 degrees. At this time, I saw military Y's altitude over the runway at 200 ft. At this point I notified supervisor of an operational error that resulted in a loss of separation.

Original NASA ASRS Text

Title: MIL Y HAD LTSS FROM ACR Z. SYS ERROR.

Narrative: I WAS WORKING THE ARR DEP SECTOR AT ACY AND HAD MIL X, A FLT OF 2 FGTS, INBOUND FROM W107. AS IS USUAL DURING IFR WX, THE LEAD ASKED TO BE SPLIT FROM HIS WINGMAN AND WORKED IN INDIVIDUALLY ON THE ILS 13 APCH. I SPLIT THE ACFT AND WORKED THEM NORMALLY UNTIL REACHING FINAL. AS BEING THE WX WAS IFR AND THE LOA BTWN MIL AND ACY TWR STIPULATES THE ACFT REMAIN ON A SINGLE FREQ UNTIL THEY LAND, I REQUESTED, FROM ACY LCL CTLR, LNDG CLRNC AND ARRESTING CABLE STATUS (RAISED/LOWERED). HE ISSUED LNDG CLRNC FOR MIL X AT WHICH TIME I REQUESTED LOW APCH CLRNC FOR MIL Y, WHICH WAS PRE-COORDINATED AND ALSO STANDARD DURING IFR WX. LCL CTL APPROVED THE LOW APCH AGAIN. ACFT WAS HANDLED NORMALLY UNTIL 1 MI FINAL AT 500 MSL WHEN LCL CTL ADVISED THAT ACR Z COMMUTER WAS 'ROLLING.' I IMMEDIATELY TOLD MIL Y TO 'GAR' AND TO CLB AND MAINTAIN 2000 FT AND TURN R HDG 220 DEGS. AT THIS TIME, I SAW MIL Y'S ALT OVER THE RWY AT 200 FT. AT THIS POINT I NOTIFIED SUPVR OF AN OPERROR THAT RESULTED IN A LOSS OF SEPARATION.

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.