Bell helicopter pilot has near miss with another helicopter near pdx.

Attributes
ACN	715343
Time
Date	200610
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pdx.airport
State Reference	OR
Altitude	msl single value : 900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Bell Helicopter Textron Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : pdx.tower
Operator	general aviation : corporate
Make Model Name	Bell Helicopter Textron Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	climbout : vacating altitude
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 7200 flight time type : 7200
ASRS Report	715343
Person 2
Affiliation	company : corporate
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 100 vertical : 10
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

I was flying around downtown on a photo mission and making calls on 123.07 the local frequency. While flying south on the southwest side of downtown a bell helicopter flew right across my windscreen approximately 100 ft out. They were talking to pdx tower and failed to make any calls on the local frequency first. I have made some calls to try and talk with the pilot to inform him of the local frequency for safer future flying and will keep trying.

Original NASA ASRS Text

Title: BELL HELI PLT HAS NEAR MISS WITH ANOTHER HELI NEAR PDX.

Narrative: I WAS FLYING AROUND DOWNTOWN ON A PHOTO MISSION AND MAKING CALLS ON 123.07 THE LCL FREQ. WHILE FLYING S ON THE SW SIDE OF DOWNTOWN A BELL HELI FLEW RIGHT ACROSS MY WINDSCREEN APPROX 100 FT OUT. THEY WERE TALKING TO PDX TWR AND FAILED TO MAKE ANY CALLS ON THE LCL FREQ FIRST. I HAVE MADE SOME CALLS TO TRY AND TALK WITH THE PLT TO INFORM HIM OF THE LCL FREQ FOR SAFER FUTURE FLYING AND WILL KEEP TRYING.

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.