Near midair collision on final approach to an airport in class B airspace (TCA).

Attributes
ACN	274976
Time
Date	199406
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 2200 msl bound upper : 2200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl
Operator	general aviation : personal
Make Model Name	PA-28 Cherokee Arrow IV
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : private
Experience	flight time last 90 days : 40 flight time total : 210 flight time type : 50
ASRS Report	274976
Person 2
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 10 vertical : 50
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was on and cleared for ILS runway 8R in MVFR conditions. Inbound from fafirst officerm. Reported inbound as requested to CTAF. Approximately 1 mi from OM my passenger/pilot alerted traffic at 11 O'clock and above on collision course. I took evasive action by power back and dive. The other aircraft passed overhead, made a 180 degree and notified tower he had me in sight. The other aircraft had been cleared behind me for straight in on runway 8R, but was heading approximately 210 degrees (runway 76 degrees). Controller should have caused separation to occur by requesting other aircraft to remain outside of class D area until I was in sight. I visited tower afterwards and controller reported to me after occurrence that aircraft was inbound from ftz VFR. Controller stated he was overloaded, visibility was bad and he did not have time for radar advisories. This airport has become extremely busy in last 6 months due to other airport closings. Student controllers are in constant use, although this was not a student controller. It sounds as if this controller was managing both runways 8R and 8L and had numerous students in pattern on runway 8L. Call for more information if required.

Original NASA ASRS Text

Title: NMAC ON FINAL APCH TO AN ARPT IN CLASS B AIRSPACE (TCA).

Narrative: I WAS ON AND CLRED FOR ILS RWY 8R IN MVFR CONDITIONS. INBOUND FROM FAF/OM. RPTED INBOUND AS REQUESTED TO CTAF. APPROX 1 MI FROM OM MY PAX/PLT ALERTED TFC AT 11 O'CLOCK AND ABOVE ON COLLISION COURSE. I TOOK EVASIVE ACTION BY PWR BACK AND DIVE. THE OTHER ACFT PASSED OVERHEAD, MADE A 180 DEG AND NOTIFIED TWR HE HAD ME IN SIGHT. THE OTHER ACFT HAD BEEN CLRED BEHIND ME FOR STRAIGHT IN ON RWY 8R, BUT WAS HDG APPROX 210 DEGS (RWY 76 DEGS). CTLR SHOULD HAVE CAUSED SEPARATION TO OCCUR BY REQUESTING OTHER ACFT TO REMAIN OUTSIDE OF CLASS D AREA UNTIL I WAS IN SIGHT. I VISITED TWR AFTERWARDS AND CTLR RPTED TO ME AFTER OCCURRENCE THAT ACFT WAS INBOUND FROM FTZ VFR. CTLR STATED HE WAS OVERLOADED, VISIBILITY WAS BAD AND HE DID NOT HAVE TIME FOR RADAR ADVISORIES. THIS ARPT HAS BECOME EXTREMELY BUSY IN LAST 6 MONTHS DUE TO OTHER ARPT CLOSINGS. STUDENT CTLRS ARE IN CONSTANT USE, ALTHOUGH THIS WAS NOT A STUDENT CTLR. IT SOUNDS AS IF THIS CTLR WAS MANAGING BOTH RWYS 8R AND 8L AND HAD NUMEROUS STUDENTS IN PATTERN ON RWY 8L. CALL FOR MORE INFO IF REQUIRED.

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.