B757 on descent for smf with nct TRACON experienced TCASII TA-RA.

Attributes
ACN	656627
Time
Date	200504
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : smf.airport
State Reference	CA
Altitude	msl single value : 3000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : nct.tracon
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : smf.tracon
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	656627
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	656625
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

Flight ZZZ-smf; maintaining 5000 ft. After tenco; received ATC vector to final and further descent to 2000 ft. During descent; received TA followed by RA. Disconnected autoplt and flew climbing escape maneuver for light plane also working norcal approach. Landed without further incident.

Original NASA ASRS Text

Title: B757 ON DSCNT FOR SMF WITH NCT TRACON EXPERIENCED TCASII TA-RA.

Narrative: FLT ZZZ-SMF; MAINTAINING 5000 FT. AFTER TENCO; RECEIVED ATC VECTOR TO FINAL AND FURTHER DSCNT TO 2000 FT. DURING DSCNT; RECEIVED TA FOLLOWED BY RA. DISCONNECTED AUTOPLT AND FLEW CLBING ESCAPE MANEUVER FOR LIGHT PLANE ALSO WORKING NORCAL APCH. LANDED WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of January 2009 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.