C206 commercial pilot has near midair collision with a helicopter.

Attributes
ACN	699701
Time
Date	200605
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 8s4.airport
State Reference	OR
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Cessna Stationair/Turbo Stationair 6
Operating Under FAR Part	Part 135
Flight Plan	VFR
Aircraft 2
Make Model Name	Helicopter
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 12800 flight time type : 7000
ASRS Report	699701
Person 2
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Miss Distance	vertical : 100
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

I was in cruise flight; returning to 8s4 with passenger picked up at a remote landing strip; and apparently the helicopter approached from approximately my 8:30 O'clock position; above; and from the left. In a high wing aircraft; that is the blind side. The helicopter flew over the top of us; and the first I saw of him; he was appearing above my windscreen. I did not have time to take any corrective action; and it us unknown whether he ever saw me. If I had TCAS; he probably would've been detected; even if he was approaching from my blind side.

Original NASA ASRS Text

Title: C206 COMMERCIAL PLT HAS NMAC WITH A HELI.

Narrative: I WAS IN CRUISE FLT; RETURNING TO 8S4 WITH PAX PICKED UP AT A REMOTE LNDG STRIP; AND APPARENTLY THE HELI APCHED FROM APPROX MY 8:30 O'CLOCK POS; ABOVE; AND FROM THE L. IN A HIGH WING ACFT; THAT IS THE BLIND SIDE. THE HELI FLEW OVER THE TOP OF US; AND THE FIRST I SAW OF HIM; HE WAS APPEARING ABOVE MY WINDSCREEN. I DID NOT HAVE TIME TO TAKE ANY CORRECTIVE ACTION; AND IT US UNKNOWN WHETHER HE EVER SAW ME. IF I HAD TCAS; HE PROBABLY WOULD'VE BEEN DETECTED; EVEN IF HE WAS APCHING FROM MY BLIND SIDE.

Data retrieved from NASA's ASRS site as of January 2009 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.