B737 on 270 degree vector to intercept the sjc ILS runway 30L, responded to a TCASII RA and descended to comply. Avoidance maneuver was successful, and the flight continued to land normally.

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Attributes
ACN	579541
Time
Date	200304
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sjc.airport
State Reference	CA
Altitude	msl bound lower : 7000 msl bound upper : 8000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa.artcc tracon : nct.tracon tower : lax.tower
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zoa.artcc tracon : nct.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : vacating altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 21000 flight time type : 2900
ASRS Report	579541
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 7000
ASRS Report	579540
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : clearance other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Miss Distance	horizontal : 12000 vertical : 300
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance
Primary Problem	Airspace Structure
Air Traffic Incident	Inter Facility Coordination Failure

Narrative:

Descending into sjc, on arrival, the flight was given a 270 degree heading to intercept the ILS from approach to runway 30L. The flight was level at 8000 ft, and a climbing aircraft was approaching on TCASII. We had a RA with the aircraft about 2 mi away and climbing 300 ft below our aircraft. We descended to avoid and advised ZOA. They wanted to know if we were established on a 270 degree heading, and we affirmed that. They thought we were south of where we should have been. ZOA then cleared us to 7000 ft and switched us off to norcal approach. Supplemental information from acn 579540: we got an RA to descend to avoid traffic. We did see the traffic about same time we descended.

Original NASA ASRS Text

Title: B737 ON 270 DEG VECTOR TO INTERCEPT THE SJC ILS RWY 30L, RESPONDED TO A TCASII RA AND DSNDED TO COMPLY. AVOIDANCE MANEUVER WAS SUCCESSFUL, AND THE FLT CONTINUED TO LAND NORMALLY.

Narrative: DSNDING INTO SJC, ON ARR, THE FLT WAS GIVEN A 270 DEG HDG TO INTERCEPT THE ILS FROM APCH TO RWY 30L. THE FLT WAS LEVEL AT 8000 FT, AND A CLBING ACFT WAS APCHING ON TCASII. WE HAD A RA WITH THE ACFT ABOUT 2 MI AWAY AND CLBING 300 FT BELOW OUR ACFT. WE DSNDED TO AVOID AND ADVISED ZOA. THEY WANTED TO KNOW IF WE WERE ESTABLISHED ON A 270 DEG HDG, AND WE AFFIRMED THAT. THEY THOUGHT WE WERE S OF WHERE WE SHOULD HAVE BEEN. ZOA THEN CLRED US TO 7000 FT AND SWITCHED US OFF TO NORCAL APCH. SUPPLEMENTAL INFO FROM ACN 579540: WE GOT AN RA TO DSND TO AVOID TFC. WE DID SEE THE TFC ABOUT SAME TIME WE DSNDED.

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.