An M20J single pilot had an near midair collision with a beech 1900 who entered the pattern at jhw, ...

Attributes
ACN	628656
Time
Date	200408
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jhw.airport
State Reference	NY
Altitude	agl single value : 700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	M-20 J (201)
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot oversight : pic
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 920 flight time type : 30
ASRS Report	628656
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	non adherence : published procedure non adherence : company policies non adherence : far other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : executed go around
Miss Distance	horizontal : 3000 vertical : 200
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

I was on an IFR flight plan into jhw (jamestown) an uncontrolled airport. I was given a visual approach to runway 31. Radar service was terminated and I was advised to switch to unicom by erie approach. I announced my intentions on unicom and due to conflicting traffic on downwind, I radioed that I would reenter the pattern on a left downwind following the aircraft I had in sight. The pilot of this aircraft communicated with me well and there was no problem. I had him in sight and he had a visual on me. I reentered the pattern on a left downwind for runway 31 and radio same on unicom. I did the same for left base for runway 31. Halfway through my left base I noticed a commuter plane (beech 1900 I believe) in front of me (about 1/2 to 2/3 of a mi in front of me) and about 200 ft below me. At the same time the pilot of this beech 1900 radioed to me 'do you have us in sight?' I stated yes and executed a go around. Prior to this, I did not hear this beech 1900 call that he was on final approach until he asked me if I had him in sight. At this point he was on about a 1/2 mi to 3/4 mi final approach. I do believe he was on a long final visual approach to runway 31 at jhw. More position reports by this commuter plane would have alerted me sooner that there was conflicting traffic on a long final approach.

Original NASA ASRS Text

Title: AN M20J SINGLE PLT HAD AN NMAC WITH A BEECH 1900 WHO ENTERED THE PATTERN AT JHW, UNANNOUNCED, WHICH CAUSED THE RPTR TO GO AROUND.

Narrative: I WAS ON AN IFR FLT PLAN INTO JHW (JAMESTOWN) AN UNCTLED ARPT. I WAS GIVEN A VISUAL APCH TO RWY 31. RADAR SVC WAS TERMINATED AND I WAS ADVISED TO SWITCH TO UNICOM BY ERIE APCH. I ANNOUNCED MY INTENTIONS ON UNICOM AND DUE TO CONFLICTING TFC ON DOWNWIND, I RADIOED THAT I WOULD REENTER THE PATTERN ON A L DOWNWIND FOLLOWING THE ACFT I HAD IN SIGHT. THE PLT OF THIS ACFT COMMUNICATED WITH ME WELL AND THERE WAS NO PROB. I HAD HIM IN SIGHT AND HE HAD A VISUAL ON ME. I REENTERED THE PATTERN ON A L DOWNWIND FOR RWY 31 AND RADIO SAME ON UNICOM. I DID THE SAME FOR L BASE FOR RWY 31. HALFWAY THROUGH MY L BASE I NOTICED A COMMUTER PLANE (BEECH 1900 I BELIEVE) IN FRONT OF ME (ABOUT 1/2 TO 2/3 OF A MI IN FRONT OF ME) AND ABOUT 200 FT BELOW ME. AT THE SAME TIME THE PLT OF THIS BEECH 1900 RADIOED TO ME 'DO YOU HAVE US IN SIGHT?' I STATED YES AND EXECUTED A GAR. PRIOR TO THIS, I DID NOT HEAR THIS BEECH 1900 CALL THAT HE WAS ON FINAL APCH UNTIL HE ASKED ME IF I HAD HIM IN SIGHT. AT THIS POINT HE WAS ON ABOUT A 1/2 MI TO 3/4 MI FINAL APCH. I DO BELIEVE HE WAS ON A LONG FINAL VISUAL APCH TO RWY 31 AT JHW. MORE POS RPTS BY THIS COMMUTER PLANE WOULD HAVE ALERTED ME SOONER THAT THERE WAS CONFLICTING TFC ON A LONG FINAL APCH.

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.

An M20J single pilot had an near midair collision with a beech 1900 who entered the pattern at jhw, unannounced, which caused the reporter to go around.