Air carrier X, TCASII RA, had less than standard separation from B757 on parallel runway. System err...

Attributes
ACN	314394
Time
Date	199508
Day	Wed
Place
Locale Reference	atc facility : msp
State Reference	MN
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent : approach
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 243 flight time total : 15000 flight time type : 12000
ASRS Report	314394
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
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	controller : issued new clearance flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 3000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier X on final approach to msp runway 11R outside FAF at 5000 ft, 2 other aircraft were approaching from our left on apparent approach to msp runway 11L, a B757 at 5000 ft and a DC9 at 6000 ft. After a moment it became clear the B757 was getting too close and the controller gave us a right 240 degree heading and we got a TCASII alert to 'descend, descend now.' the controller then gave us a descent to 4000 ft and we turned and descended as instructed and came back around for another approach. Once on the ground I called the approach supervisor and he said, 'there was training going on and a mistake was made and both controllers were pulled off and given a talking to.' the supervisor then apologized and said he would take no further action. We were accused of not descending to 4000 ft when asked by the in-training controller. Not true, we were instructed to descend to 4000 ft after given the turn off the approach and after the TCASII alert.

Original NASA ASRS Text

Title: ACR X, TCASII RA, HAD LTSS FROM B757 ON PARALLEL RWY. SYS ERROR.

Narrative: ACR X ON FINAL APCH TO MSP RWY 11R OUTSIDE FAF AT 5000 FT, 2 OTHER ACFT WERE APCHING FROM OUR L ON APPARENT APCH TO MSP RWY 11L, A B757 AT 5000 FT AND A DC9 AT 6000 FT. AFTER A MOMENT IT BECAME CLR THE B757 WAS GETTING TOO CLOSE AND THE CTLR GAVE US A R 240 DEG HDG AND WE GOT A TCASII ALERT TO 'DSND, DSND NOW.' THE CTLR THEN GAVE US A DSCNT TO 4000 FT AND WE TURNED AND DSNDED AS INSTRUCTED AND CAME BACK AROUND FOR ANOTHER APCH. ONCE ON THE GND I CALLED THE APCH SUPVR AND HE SAID, 'THERE WAS TRAINING GOING ON AND A MISTAKE WAS MADE AND BOTH CTLRS WERE PULLED OFF AND GIVEN A TALKING TO.' THE SUPVR THEN APOLOGIZED AND SAID HE WOULD TAKE NO FURTHER ACTION. WE WERE ACCUSED OF NOT DSNDING TO 4000 FT WHEN ASKED BY THE IN-TRAINING CTLR. NOT TRUE, WE WERE INSTRUCTED TO DSND TO 4000 FT AFTER GIVEN THE TURN OFF THE APCH AND AFTER THE TCASII ALERT.

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.

Air carrier X, TCASII RA, had less than standard separation from B757 on parallel runway. System error.