Flight crew of an medium large transport failed to turn onto the lda final course from an ATC base leg vector resulting in a TCASII RA and intervention by the controller.

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Attributes
ACN	308320
Time
Date	199506
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 4000 msl bound upper : 5000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp
Experience	flight time last 90 days : 120 flight time total : 17500 flight time type : 250
ASRS Report	308320
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 1000 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were given radar vectors to the lda runway 12L at stl. The controller was very busy, giving us several different step down altitudes, changing his mind on them a couple of times. He turned us on a base leg (210 degrees) about 11 mi out at a fairly high altitude. I was trying to get the airplane configured to get down when we received a TCASII 'traffic' about this time. I realized we should be turning into the lda and that the 'traffic' was on the parallel ILS. About this time the controller said 'are you guys going to start your turn?' my captain responded 'we never got one' (I never heard one given). At this time we got a 'climb, climb now' TCASII and the controller took us off the approach and we climbed. We were never less than 1000 ft from the other aircraft. This lda approach is a very demanding approach during busy times. I think the whole lda system at stl needs to be looked at. Another thing that would help is a NDB on the lda. This would really help in your situational awareness. If we would have had this aid, I would have seen we were getting close to the lda course and would have questioned the turn on.

Original NASA ASRS Text

Title: FLC OF AN MLG FAILED TO TURN ONTO THE LDA FINAL COURSE FROM AN ATC BASE LEG VECTOR RESULTING IN A TCASII RA AND INTERVENTION BY THE CTLR.

Narrative: WE WERE GIVEN RADAR VECTORS TO THE LDA RWY 12L AT STL. THE CTLR WAS VERY BUSY, GIVING US SEVERAL DIFFERENT STEP DOWN ALTS, CHANGING HIS MIND ON THEM A COUPLE OF TIMES. HE TURNED US ON A BASE LEG (210 DEGS) ABOUT 11 MI OUT AT A FAIRLY HIGH ALT. I WAS TRYING TO GET THE AIRPLANE CONFIGURED TO GET DOWN WHEN WE RECEIVED A TCASII 'TFC' ABOUT THIS TIME. I REALIZED WE SHOULD BE TURNING INTO THE LDA AND THAT THE 'TFC' WAS ON THE PARALLEL ILS. ABOUT THIS TIME THE CTLR SAID 'ARE YOU GUYS GOING TO START YOUR TURN?' MY CAPT RESPONDED 'WE NEVER GOT ONE' (I NEVER HEARD ONE GIVEN). AT THIS TIME WE GOT A 'CLB, CLB NOW' TCASII AND THE CTLR TOOK US OFF THE APCH AND WE CLBED. WE WERE NEVER LESS THAN 1000 FT FROM THE OTHER ACFT. THIS LDA APCH IS A VERY DEMANDING APCH DURING BUSY TIMES. I THINK THE WHOLE LDA SYS AT STL NEEDS TO BE LOOKED AT. ANOTHER THING THAT WOULD HELP IS A NDB ON THE LDA. THIS WOULD REALLY HELP IN YOUR SITUATIONAL AWARENESS. IF WE WOULD HAVE HAD THIS AID, I WOULD HAVE SEEN WE WERE GETTING CLOSE TO THE LDA COURSE AND WOULD HAVE QUESTIONED THE TURN ON.

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.