A11 controller described a near loss of separation when a fellow controller requested aircraft be tr...

Attributes
ACN	817265
Time
Date	200812
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : anc.airport
State Reference	AK
Altitude	agl single value : 3000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : a11.tracon
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : a11.tracon
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : developmental
Experience	controller military : 3 controller radar : 4 controller time certified in position1 : 1
ASRS Report	817265
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Miss Distance	horizontal : 13000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance

Narrative:

I was working south radar and was feeding my final controller. Weather was IFR and everybody was conducting the ILS approach. North radar had an airplane (air carrier X) B190 on a left base for final. This aircraft was talking to final radar and was at 3;000 ft (as per our facility order). I; south radar; had an air taxi Y B190 that was at 3;000 ft and I asked the final controller if a heading of 320 degrees would be acceptable. As a 340 degree heading would put both airplanes on converging opposite bases at the same altitude; final controller said 'no; put him on a base.' I then replied that air taxi X was also on an opposite base at the same altitude. Final controller didn't want to change the sequence. I then put the air taxi Y on a true base leg; 340 degrees and shipped the aircraft to the final controller. About 2 minutes later; I noticed that the air taxi X aircraft had not received an ILS approach clearance and that the final controller forgot to clear the aircraft. Final controller was late on doing so. Final controller cleared the air taxi X through the localizer and immediately turned the air taxi Y aircraft to a sharp left turn to avoid a conflict.

Original NASA ASRS Text

Title: A11 Controller described a near loss of separation when a fellow controller requested aircraft be transferred to his/her sector on opposite base track; at the same altitude; resulting in a vector through the LOC to secure separation.

Narrative: I was working South Radar and was feeding my Final Controller. Weather was IFR and everybody was conducting the ILS Approach. North Radar had an airplane (Air Carrier X) B190 on a left base for final. This aircraft was talking to Final Radar and was at 3;000 FT (as per our facility order). I; South Radar; had an Air Taxi Y B190 that was at 3;000 FT and I asked the Final Controller if a heading of 320 degrees would be acceptable. As a 340 degree heading would put both airplanes on converging opposite bases at the same altitude; Final Controller said 'No; put him on a base.' I then replied that Air Taxi X was also on an opposite base at the same altitude. Final Controller didn't want to change the sequence. I then put the Air Taxi Y on a true base leg; 340 degrees and shipped the aircraft to the Final Controller. About 2 minutes later; I noticed that the Air Taxi X aircraft had not received an ILS approach clearance and that the Final Controller forgot to clear the aircraft. Final Controller was late on doing so. Final Controller cleared the Air Taxi X through the LOC and immediately turned the Air Taxi Y aircraft to a sharp left turn to avoid a conflict.

Data retrieved from NASA's ASRS site as of May 2009 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.

A11 controller described a near loss of separation when a fellow controller requested aircraft be transferred to his/her sector on opposite base track; at the same altitude; resulting in a vector through the localizer to secure separation.