C182 pilot meets with C150 pilot after near miss in traffic pattern of uncontrolled airport.

Attributes
ACN	441776
Time
Date	199906
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : shn.airport
State Reference	WA
Altitude	msl single value : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	VFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 40 flight time total : 780 flight time type : 200
ASRS Report	441776
Person 2
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : required legal separation non adherence : far non adherence : published procedure
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 200 vertical : 400
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

While descending from jump altitude (4000 ft MSL) I was monitoring 122.8 at shn for traffic. Did not hear any traffic reporting. I entered a 2 mi left 45 degree entry for runway 23. While scanning for traffic, I saw none, as I was about 1/2 mi from the downwind leg when I heard and saw traffic on the downwind. We were heading for a conflict so I chose to descend below what appeared to be climbing traffic. I proceeded to land and taxi to the tie-downs. The other pilot landed and we spoke. He stated that he saw me on the 45 degree entry while he was turning from crosswind to downwind. He took no corrective action to avoid the conflict. I was descended to pattern altitude while on the 45 degree and missed seeing his dark colored aircraft in the trees behind him. We spoke about better scan and verbal communication. I felt this was a positive learning experience for both parties.

Original NASA ASRS Text

Title: C182 PLT MEETS WITH C150 PLT AFTER NEAR MISS IN TFC PATTERN OF UNCTLED ARPT.

Narrative: WHILE DSNDING FROM JUMP ALT (4000 FT MSL) I WAS MONITORING 122.8 AT SHN FOR TFC. DID NOT HEAR ANY TFC RPTING. I ENTERED A 2 MI L 45 DEG ENTRY FOR RWY 23. WHILE SCANNING FOR TFC, I SAW NONE, AS I WAS ABOUT 1/2 MI FROM THE DOWNWIND LEG WHEN I HEARD AND SAW TFC ON THE DOWNWIND. WE WERE HDG FOR A CONFLICT SO I CHOSE TO DSND BELOW WHAT APPEARED TO BE CLBING TFC. I PROCEEDED TO LAND AND TAXI TO THE TIE-DOWNS. THE OTHER PLT LANDED AND WE SPOKE. HE STATED THAT HE SAW ME ON THE 45 DEG ENTRY WHILE HE WAS TURNING FROM XWIND TO DOWNWIND. HE TOOK NO CORRECTIVE ACTION TO AVOID THE CONFLICT. I WAS DSNDED TO PATTERN ALT WHILE ON THE 45 DEG AND MISSED SEEING HIS DARK COLORED ACFT IN THE TREES BEHIND HIM. WE SPOKE ABOUT BETTER SCAN AND VERBAL COM. I FELT THIS WAS A POSITIVE LEARNING EXPERIENCE FOR BOTH PARTIES.

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.