Near midair collision.

Attributes
ACN	273026
Time
Date	199406
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lvk airport : sjc
State Reference	CA
Altitude	msl bound lower : 4500 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	cruise other cruise other
Route In Use	enroute airway : zoa
Flight Plan	None
Aircraft 2
Operator	general aviation : instructional
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : cfi pilot : atp
Experience	flight time last 90 days : 38 flight time total : 8000 flight time type : 11
ASRS Report	273026
Person 2
Affiliation	Other
Function	flight crew : single pilot instruction : instructor
Qualification	pilot : cfi pilot : commercial pilot : instrument
Experience	flight time last 90 days : 95 flight time total : 1850
ASRS Report	273029
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 800 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Was flying heading 352 degrees at 4500 ft en route to rio vista, ca. Saw cessna head on at approximately 1/4 mi. Immediate right rudder and full aileron to the right barely got me out of the way. TRACON notified me that aircraft was passing me. Closest near midair collision I have experienced. This is the second for me in this general vicinity. The last time, bay didn't see the twin that went over me within 100 ft. Maybe there is a problem with radar in this area. Other pilot said he was descending through 4800 ft when we passed. Other aircraft was from major flight school at sjc doing instrument work. Student was under hood at time. Supplemental information from acn 273029: I had him descend at 500 FPM rate of descent to 3000 ft for entry into sjc class D airspace. I put the landing light on for the descent and made the decision to contact bay approach. At around 5000 ft I saw a cessna 172 take a hard right evasive turn at about the same altitude. By the time I saw the cessna, it was too late to take an evasive maneuver.

Original NASA ASRS Text

Title: NMAC.

Narrative: WAS FLYING HDG 352 DEGS AT 4500 FT ENRTE TO RIO VISTA, CA. SAW CESSNA HEAD ON AT APPROX 1/4 MI. IMMEDIATE R RUDDER AND FULL AILERON TO THE R BARELY GOT ME OUT OF THE WAY. TRACON NOTIFIED ME THAT ACFT WAS PASSING ME. CLOSEST NMAC I HAVE EXPERIENCED. THIS IS THE SECOND FOR ME IN THIS GENERAL VICINITY. THE LAST TIME, BAY DIDN'T SEE THE TWIN THAT WENT OVER ME WITHIN 100 FT. MAYBE THERE IS A PROB WITH RADAR IN THIS AREA. OTHER PLT SAID HE WAS DSNDING THROUGH 4800 FT WHEN WE PASSED. OTHER ACFT WAS FROM MAJOR FLT SCHOOL AT SJC DOING INST WORK. STUDENT WAS UNDER HOOD AT TIME. SUPPLEMENTAL INFO FROM ACN 273029: I HAD HIM DSND AT 500 FPM RATE OF DSCNT TO 3000 FT FOR ENTRY INTO SJC CLASS D AIRSPACE. I PUT THE LNDG LIGHT ON FOR THE DSCNT AND MADE THE DECISION TO CONTACT BAY APCH. AT AROUND 5000 FT I SAW A CESSNA 172 TAKE A HARD R EVASIVE TURN AT ABOUT THE SAME ALT. BY THE TIME I SAW THE CESSNA, IT WAS TOO LATE TO TAKE AN EVASIVE MANEUVER.

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.