Close proximity commuter-small transport GA-small aircraft 9 southeast of osi at 6000'.

Attributes
ACN	182669
Time
Date	199107
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : osi
State Reference	CA
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute airway : v25
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : private pilot : atp
Experience	flight time last 90 days : 100 flight time total : 3500 flight time type : 1500
ASRS Report	182669
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

In cruise flight on our IFR flight plan direct to the osi VOR at 6000 ft MSL (flight mry-sfo), the first officer, who was PF at the time, pointed out traffic at 1 moving to 2 O'clock exactly at our altitude. The traffic was so close, it passed before we could take evasive action. Traffic appeared to be on a west heading. Aircraft was a high wing taildragger type, white with red stripes. I asked bay approach if there was any traffic in my vicinity and was told no, 'no traffic observed.' I said that I wanted to file a near midair collision report and was told to do so after landing. First officer said traffic was not visible to him as it was hidden behind the windshield post which on the small transport is rather wide. I was head down copying sfo arrival ATIS.

Original NASA ASRS Text

Title: CLOSE PROX COMMUTER-SMT GA-SMA 9 SOUTHEAST OF OSI AT 6000'.

Narrative: IN CRUISE FLT ON OUR IFR FLT PLAN DIRECT TO THE OSI VOR AT 6000 FT MSL (FLT MRY-SFO), THE FO, WHO WAS PF AT THE TIME, POINTED OUT TFC AT 1 MOVING TO 2 O'CLOCK EXACTLY AT OUR ALT. THE TFC WAS SO CLOSE, IT PASSED BEFORE WE COULD TAKE EVASIVE ACTION. TFC APPEARED TO BE ON A W HDG. ACFT WAS A HIGH WING TAILDRAGGER TYPE, WHITE WITH RED STRIPES. I ASKED BAY APCH IF THERE WAS ANY TFC IN MY VICINITY AND WAS TOLD NO, 'NO TFC OBSERVED.' I SAID THAT I WANTED TO FILE A NMAC RPT AND WAS TOLD TO DO SO AFTER LNDG. FO SAID TFC WAS NOT VISIBLE TO HIM AS IT WAS HIDDEN BEHIND THE WINDSHIELD POST WHICH ON THE SMT IS RATHER WIDE. I WAS HEAD DOWN COPYING SFO ARR ATIS.

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.