Near midair collision.

Attributes
ACN	261546
Time
Date	199401
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hya
State Reference	MA
Altitude	msl bound lower : 1000 msl bound upper : 1000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hya artcc : dfw
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach other
Route In Use	approach : visual
Flight Plan	VFR
Aircraft 2
Make Model Name	PA-28 Cherokee/Archer II/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	descent : approach other
Route In Use	approach : straight in
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 160 flight time total : 8500 flight time type : 3000
ASRS Report	261546
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 350 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

As I approached hya for a left base for runway 24 after my initial contact from 10 mi out, I heard hya ATC tell a cherokee who called reporting south of the airport to report a 3 mi straight in final for runway 33. Looking for the traffic off to my left, about 6 mi southeast of hya to my surprise and 1/4 mi ahead to my right was the cherokee passing behind some of the sct clouds. I started a slow climb and right turn as so to pass above and behind the cherokee. But he saw me and started an immediate climbing right hand 180 degree turn, I believe putting us on more of a conflicting course, as he told the hya ATC that he was turning to avoid conflicting traffic. I reported the traffic in sight and change my turn left 20 degrees to avoid traffic. Hya ATC radar was OTS at the time of this conflict, and the tower told the cherokee he was not at the position he said he was at.

Original NASA ASRS Text

Title: NMAC.

Narrative: AS I APCHED HYA FOR A L BASE FOR RWY 24 AFTER MY INITIAL CONTACT FROM 10 MI OUT, I HEARD HYA ATC TELL A CHEROKEE WHO CALLED RPTING S OF THE ARPT TO RPT A 3 MI STRAIGHT IN FINAL FOR RWY 33. LOOKING FOR THE TFC OFF TO MY L, ABOUT 6 MI SE OF HYA TO MY SURPRISE AND 1/4 MI AHEAD TO MY R WAS THE CHEROKEE PASSING BEHIND SOME OF THE SCT CLOUDS. I STARTED A SLOW CLB AND R TURN AS SO TO PASS ABOVE AND BEHIND THE CHEROKEE. BUT HE SAW ME AND STARTED AN IMMEDIATE CLBING R HAND 180 DEG TURN, I BELIEVE PUTTING US ON MORE OF A CONFLICTING COURSE, AS HE TOLD THE HYA ATC THAT HE WAS TURNING TO AVOID CONFLICTING TFC. I RPTED THE TFC IN SIGHT AND CHANGE MY TURN L 20 DEGS TO AVOID TFC. HYA ATC RADAR WAS OTS AT THE TIME OF THIS CONFLICT, AND THE TWR TOLD THE CHEROKEE HE WAS NOT AT THE POS HE SAID HE WAS AT.

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.