Close proximity between VFR small aircraft and IFR air carrier on ILS approach, due in part, to pilot vision being obstructed by high wing aircraft design.

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Attributes
ACN	82225
Time
Date	198802
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sjc
State Reference	CA
Altitude	msl bound lower : 3000 msl bound upper : 3150
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : oak
Operator	general aviation : instructional
Make Model Name	Small Aircraft, High Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : atp pilot : cfi pilot : commercial
Experience	flight time last 90 days : 74 flight time total : 6900 flight time type : 74
ASRS Report	82225
Person 2
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 300 vertical : 150
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was cruising level about 3000' perpendicular to the ILS 30L approach course of san jose. An medium large transport passed over top. His wheels were up. Snap estimate is that he took no evasive action. I took no evasive action because it was over quickly. I was remiss for crossing the ILS west/O more looking. The medium large transport was hidden by my high left wing and my attention was more to the ground than the in-flight conditions. No rules were broken. I was squawking 1200 and on altitude so bay approach may have warned the medium large transport of my position. I suspect my position could have been hidden by the cockpit walls of the medium large transport since I was below and to the right for the medium large transport copilot. The medium large transport was obviously on the ILS to san jose. This incident is an example of why an arsa should be in placed around san jose airport. More attention will be exercised when flying in the vicinity of the ILS final approach course until an arsa is in place.

Original NASA ASRS Text

Title: CLOSE PROX BETWEEN VFR SMA AND IFR ACR ON ILS APCH, DUE IN PART, TO PLT VISION BEING OBSTRUCTED BY HIGH WING ACFT DESIGN.

Narrative: I WAS CRUISING LEVEL ABOUT 3000' PERPENDICULAR TO THE ILS 30L APCH COURSE OF SAN JOSE. AN MLG PASSED OVER TOP. HIS WHEELS WERE UP. SNAP ESTIMATE IS THAT HE TOOK NO EVASIVE ACTION. I TOOK NO EVASIVE ACTION BECAUSE IT WAS OVER QUICKLY. I WAS REMISS FOR XING THE ILS W/O MORE LOOKING. THE MLG WAS HIDDEN BY MY HIGH LEFT WING AND MY ATTN WAS MORE TO THE GND THAN THE INFLT CONDITIONS. NO RULES WERE BROKEN. I WAS SQUAWKING 1200 AND ON ALT SO BAY APCH MAY HAVE WARNED THE MLG OF MY POS. I SUSPECT MY POS COULD HAVE BEEN HIDDEN BY THE COCKPIT WALLS OF THE MLG SINCE I WAS BELOW AND TO THE RIGHT FOR THE MLG COPLT. THE MLG WAS OBVIOUSLY ON THE ILS TO SAN JOSE. THIS INCIDENT IS AN EXAMPLE OF WHY AN ARSA SHOULD BE IN PLACED AROUND SAN JOSE ARPT. MORE ATTN WILL BE EXERCISED WHEN FLYING IN THE VICINITY OF THE ILS FINAL APCH COURSE UNTIL AN ARSA IS IN PLACE.

Data retrieved from NASA's ASRS site as of August 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.