Near midair collision at uncontrolled airport in pattern.

Attributes
ACN	237296
Time
Date	199303
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : s50
State Reference	WA
Altitude	msl bound lower : 900 msl bound upper : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phx
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : takeoff landing other other
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	other
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot instruction : trainee
Qualification	pilot : student
ASRS Report	237296
Person 2
Affiliation	Other
Function	instruction : instructor oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : cfi
Events
Anomaly	conflict : nmac other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was performing touch and go operations at S50 with an instructor. During crosswind 2 aircraft were heard debating entry into pattern. Upon turning downwind, I announced being on downwind for runway 34 (active). One of the 2 aircraft has entered the pattern and is on downwind past midfield. The second aircraft is seen wbound in right bank and shortly announces being on the 45 degree for runway 34. Continuation of course would intersect or put him near behind. I began climbing turn to the left (towards field) the other aircraft now seeing me turned right (away from field) in descending turn.

Original NASA ASRS Text

Title: NMAC AT UNCTLED ARPT IN PATTERN.

Narrative: I WAS PERFORMING TOUCH AND GO OPS AT S50 WITH AN INSTRUCTOR. DURING XWIND 2 ACFT WERE HEARD DEBATING ENTRY INTO PATTERN. UPON TURNING DOWNWIND, I ANNOUNCED BEING ON DOWNWIND FOR RWY 34 (ACTIVE). ONE OF THE 2 ACFT HAS ENTERED THE PATTERN AND IS ON DOWNWIND PAST MIDFIELD. THE SECOND ACFT IS SEEN WBOUND IN R BANK AND SHORTLY ANNOUNCES BEING ON THE 45 DEG FOR RWY 34. CONTINUATION OF COURSE WOULD INTERSECT OR PUT HIM NEAR BEHIND. I BEGAN CLBING TURN TO THE L (TOWARDS FIELD) THE OTHER ACFT NOW SEEING ME TURNED R (AWAY FROM FIELD) IN DSNDING TURN.

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.