Air carrier X had less than standard separation from air carrier Y. System error.

Attributes
ACN	186684
Time
Date	199108
Day	Mon
Place
Locale Reference	atc facility : grr
State Reference	MI
Altitude	msl bound lower : 2700 msl bound upper : 2700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : grr
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : developmental
ASRS Report	186684
Person 2
Affiliation	government : faa
Function	controller : approach oversight : supervisor
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error
Situations
ATC Facility	other physical facility procedure or policy : unspecified

Narrative:

I was training on south radar. I had air carrier X just south of the localizer that was northbound that I cleared for the approach. He didn't take the turn so I cleared the aircraft again. He still didn't turn. The north controller had air carrier Y he was vectoring for the approach, when the north controller saw my aircraft going through the localizer he turned air carrier Y northeast. I then turned air carrier X southeast. The problem was equipment. The button that activates the landline between us and kalamazoo was punched in, but the light that indicates so was burned out. When this line is punched in no transmissions go out to aircraft. Supplemental information from acn 187798. Air carrier Y on approach to grr. Controller said turn left to heading and climb to 4000 ft, traffic at our 1 O'clock position. TCAS also showed traffic. Approach supervisor said air carrier X did not acknowledge call for turn to final.

Original NASA ASRS Text

Title: ACR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: I WAS TRAINING ON S RADAR. I HAD ACR X JUST S OF THE LOC THAT WAS NBOUND THAT I CLRED FOR THE APCH. HE DIDN'T TAKE THE TURN SO I CLRED THE ACFT AGAIN. HE STILL DIDN'T TURN. THE N CTLR HAD ACR Y HE WAS VECTORING FOR THE APCH, WHEN THE N CTLR SAW MY ACFT GOING THROUGH THE LOC HE TURNED ACR Y NE. I THEN TURNED ACR X SE. THE PROBLEM WAS EQUIP. THE BUTTON THAT ACTIVATES THE LANDLINE BTWN US AND KALAMAZOO WAS PUNCHED IN, BUT THE LIGHT THAT INDICATES SO WAS BURNED OUT. WHEN THIS LINE IS PUNCHED IN NO TRANSMISSIONS GO OUT TO ACFT. SUPPLEMENTAL INFO FROM ACN 187798. ACR Y ON APCH TO GRR. CTLR SAID TURN L TO HDG AND CLB TO 4000 FT, TFC AT OUR 1 O'CLOCK POS. TCAS ALSO SHOWED TFC. APCH SUPVR SAID ACR X DID NOT ACKNOWLEDGE CALL FOR TURN TO FINAL.

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.