TCASII RA during localizer approach.

Attributes
ACN	548959
Time
Date	200205
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Weather Elements	other
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : i90.tracon tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 27 other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : i90.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 20000 flight time type : 14000
ASRS Report	548959
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : nmac non adherence : required legal separation
Independent Detector	aircraft equipment : tcas
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Weather
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On localizer runway 27 iah before trann intersection at 4000 ft MSL, cleared to 3000 ft. ATC called out VFR traffic 10 O'clock position, left to right. TCASII showed aircraft climbing. We had no visual in haze. We were level at 3000 ft, VFR. Aircraft was still climbing. TA advisory went to RA warning, directed climb which was immediately accomplished. VFR aircraft was seen coming out on right side. We were within 300-200 ft vertical separation. We were on localizer 27 between trann and dento intxns (19.5 - 14.5 DME).

Original NASA ASRS Text

Title: TCASII RA DURING LOC APCH.

Narrative: ON LOC RWY 27 IAH BEFORE TRANN INTXN AT 4000 FT MSL, CLRED TO 3000 FT. ATC CALLED OUT VFR TFC 10 O'CLOCK POS, L TO R. TCASII SHOWED ACFT CLBING. WE HAD NO VISUAL IN HAZE. WE WERE LEVEL AT 3000 FT, VFR. ACFT WAS STILL CLBING. TA ADVISORY WENT TO RA WARNING, DIRECTED CLB WHICH WAS IMMEDIATELY ACCOMPLISHED. VFR ACFT WAS SEEN COMING OUT ON R SIDE. WE WERE WITHIN 300-200 FT VERT SEPARATION. WE WERE ON LOC 27 BTWN TRANN AND DENTO INTXNS (19.5 - 14.5 DME).

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.