Air carrier X TCASII RA. Had less than standard separation from MTR Y on approach. System error.

Attributes
ACN	253628
Time
Date	199310
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : abq
State Reference	NM
Altitude	msl bound lower : 9000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : abq tower : lex
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Trainer
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	253628
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

Our primary runway 08/26 is closed due to extensive construction. We use a single runway operation when the wind is above 10 KTS. We were using runway 17 with wind 220 at 10 KTS. Very busy with 2 radar position open handling arrs and departures. Air carrier X inbound from the north descended to 12000 and on a heading of 180 degrees. Air carrier X receives and responds to a TCASII warning. MTR Y is northbound at 12000 on the other radar controller's frequency. As air carrier X is northbound at 9000 on a right downwind, they receive and respond to another TCASII warning from the same MTR Y at 9400 descending on final to runway 17. Both TCASII warnings alerted the crew of air carrier X to MTR Y at nearly the same altitude and 3 mi or less. Our staffing numbers are so inadequate, we were unable to open a final radar scope, which would relieve frequency congestion and sequencing confusion. We were very busy and needed more personnel.

Original NASA ASRS Text

Title: ACR X TCASII RA. HAD LTSS FROM MTR Y ON APCH. SYS ERROR.

Narrative: OUR PRIMARY RWY 08/26 IS CLOSED DUE TO EXTENSIVE CONSTRUCTION. WE USE A SINGLE RWY OP WHEN THE WIND IS ABOVE 10 KTS. WE WERE USING RWY 17 WITH WIND 220 AT 10 KTS. VERY BUSY WITH 2 RADAR POS OPEN HANDLING ARRS AND DEPS. ACR X INBOUND FROM THE N DSNDED TO 12000 AND ON A HDG OF 180 DEGS. ACR X RECEIVES AND RESPONDS TO A TCASII WARNING. MTR Y IS NBOUND AT 12000 ON THE OTHER RADAR CTLR'S FREQ. AS ACR X IS NBOUND AT 9000 ON A R DOWNWIND, THEY RECEIVE AND RESPOND TO ANOTHER TCASII WARNING FROM THE SAME MTR Y AT 9400 DSNDING ON FINAL TO RWY 17. BOTH TCASII WARNINGS ALERTED THE CREW OF ACR X TO MTR Y AT NEARLY THE SAME ALT AND 3 MI OR LESS. OUR STAFFING NUMBERS ARE SO INADEQUATE, WE WERE UNABLE TO OPEN A FINAL RADAR SCOPE, WHICH WOULD RELIEVE FREQ CONGESTION AND SEQUENCING CONFUSION. WE WERE VERY BUSY AND NEEDED MORE PERSONNEL.

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.