CL65 crew on approach to sjc have near midair collision with C170.

Attributes
ACN	568382
Time
Date	200211
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : sjc.vor
State Reference	CA
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : sjc.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna 180 Skywagon
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 225 flight time total : 4500 flight time type : 1500
ASRS Report	568382
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac inflight encounter other non adherence : far
Independent Detector	atc equipment other atc equipment : radar other controllera other flight crewa other flight crewb other other : 3
Resolutory Action	none taken : detected after the fact
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Near midair collision on a visual approach into sjc the C170 was flying west into setting sun with 9 mi and haze above sjc's airspace and outside of sfo's airspace. Transponder was not on or installed on C170. If all aircraft were required to have operating transponder, the TCASII would have alerted us to the C170's location and near midair collision would not have happened.

Original NASA ASRS Text

Title: CL65 CREW ON APCH TO SJC HAVE NMAC WITH C170.

Narrative: NMAC ON A VISUAL APCH INTO SJC THE C170 WAS FLYING W INTO SETTING SUN WITH 9 MI AND HAZE ABOVE SJC'S AIRSPACE AND OUTSIDE OF SFO'S AIRSPACE. XPONDER WAS NOT ON OR INSTALLED ON C170. IF ALL ACFT WERE REQUIRED TO HAVE OPERATING XPONDER, THE TCASII WOULD HAVE ALERTED US TO THE C170'S LOCATION AND NMAC WOULD NOT HAVE HAPPENED.

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.