Close proximity two GA smas in traffic pattern at L71.

Attributes
ACN	108764
Time
Date	198904
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : l71
State Reference	CA
Altitude	msl bound lower : 3200 msl bound upper : 3300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	other
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 15 flight time total : 115 flight time type : 25
ASRS Report	108764
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 100 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I had just executed a go-around due to a glider. I announced what I was doing on CTAF, flew upwind, turned crosswind, announced again. At that point an small aircraft Y announced entering downwind, midfield. Both my passenger and I concentrated our scanning to the right of us since I was still on crosswind. We could not find the traffic. At that point I looked to the left, to see our traffic downwind to our left -- not midfield! It is extremely important to say where you really are! I did take evasive action to miss the small aircraft Y, by turning right immediately. The small aircraft Y took no action.

Original NASA ASRS Text

Title: CLOSE PROX TWO GA SMAS IN TRAFFIC PATTERN AT L71.

Narrative: I HAD JUST EXECUTED A GO-AROUND DUE TO A GLIDER. I ANNOUNCED WHAT I WAS DOING ON CTAF, FLEW UPWIND, TURNED XWIND, ANNOUNCED AGAIN. AT THAT POINT AN SMA Y ANNOUNCED ENTERING DOWNWIND, MIDFIELD. BOTH MY PAX AND I CONCENTRATED OUR SCANNING TO THE RIGHT OF US SINCE I WAS STILL ON XWIND. WE COULD NOT FIND THE TFC. AT THAT POINT I LOOKED TO THE LEFT, TO SEE OUR TFC DOWNWIND TO OUR LEFT -- NOT MIDFIELD! IT IS EXTREMELY IMPORTANT TO SAY WHERE YOU REALLY ARE! I DID TAKE EVASIVE ACTION TO MISS THE SMA Y, BY TURNING RIGHT IMMEDIATELY. THE SMA Y TOOK NO ACTION.

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.