An small aircraft helicopter and an small transport had a traffic pattern conflict.

Attributes
ACN	260007
Time
Date	199312
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ptw
State Reference	PA
Altitude	agl bound lower : 300 agl bound upper : 300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Helicopter
Flight Phase	cruise other descent : approach landing : go around
Flight Plan	None
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other descent : approach landing : go around
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 35 flight time total : 7580 flight time type : 2100
ASRS Report	260007
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe non adherence : far other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was approaching the airport from the southwest and intending to land on the southwest taxiway of runway 28. I was monitoring the pottstown/limerick unicom and heard a transmission from an small transport on final for runway 28. I immediately turned to a heading of 250 to show my intentions of not to conflict with his landing. I then had visual contact with the small transport. Almost immediately, he announced his intentions to go around for another approach. I had not heard any previous xmissions from the small transport. Since we simultaneously took evasive action we both landed without incident. I attempted to contact the small transport and got no response.

Original NASA ASRS Text

Title: AN SMA HELI AND AN SMT HAD A TFC PATTERN CONFLICT.

Narrative: I WAS APCHING THE ARPT FROM THE SW AND INTENDING TO LAND ON THE SW TXWY OF RWY 28. I WAS MONITORING THE POTTSTOWN/LIMERICK UNICOM AND HEARD A XMISSION FROM AN SMT ON FINAL FOR RWY 28. I IMMEDIATELY TURNED TO A HDG OF 250 TO SHOW MY INTENTIONS OF NOT TO CONFLICT WITH HIS LNDG. I THEN HAD VISUAL CONTACT WITH THE SMT. ALMOST IMMEDIATELY, HE ANNOUNCED HIS INTENTIONS TO GAR FOR ANOTHER APCH. I HAD NOT HEARD ANY PREVIOUS XMISSIONS FROM THE SMT. SINCE WE SIMULTANEOUSLY TOOK EVASIVE ACTION WE BOTH LANDED WITHOUT INCIDENT. I ATTEMPTED TO CONTACT THE SMT AND GOT NO RESPONSE.

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.