Close proximity GA-small aircraft GA-small transport on airway same direction.

Attributes
ACN	167165
Time
Date	199101
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ubg
State Reference	OR
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : instructional
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	cruise other
Route In Use	enroute airway : v287
Flight Plan	None
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 43 flight time total : 220 flight time type : 20
ASRS Report	167165
Person 2
Affiliation	Other
Function	flight crew : single pilot
Events
Anomaly	conflict : airborne less severe non adherence : far
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1500 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On the evening of 1/fri/91, I was proceeding north on V287 south of portland, or, in an small aircraft. I was cruising at 110 KTS TAS, VFR at 7500' MSL, and I was receiving VFR flight following from ZSE. It was fully dark out, but conditions were clear, with unrestricted visibility. 15 DME from the ubg VOR, inbound on the 183 degree right, I heard center advised a twin small transport that I had traffic, an small aircraft, '12 O'clock, same altitude, same direction.' the small transport pilot responded that he was looking. Center then called me to advise of a 'twin small transport, same altitude and directly behind.' I acknowledged that I was also looking. Center again called the twin small transport to advise the traffic 'is 12 O'clock, same altitude, same direction, less than 1 mi, and you've got 40 KTS on him.' the small transport then called, 'traffic in sight.' center called me to advise of traffic, 7 O'clock, 1 mi, same altitude, same direction. I was able to spot the small transport and advised center. The small transport passed me on the left, at a distance of approximately 3/4 mi. It maintained a steady course which appeared to parallel mine closely, with no tendency to converge. As the small transport passed abeam of me and moved ahead to my 10 O'clock position. I momentarily glanced inside the cockpit to scan the gauges and then looked out to survey the quadrants of the sky ahead and to the right. When I looked back toward the small transport, it appeared to be in a steep right bank and was cutting directly across my flight path. I turned sharply to the left to pass behind the small transport and pulled up to climb 200'. The small transport continued its turn, crossing my original flight path at what appeared to be a 90 degree angle. I estimate our closest approach at less than 1/4 mi. I believe that there is a substantial chance we would have collided if I had not noted his action in time and executed evasive maneuvers. I consider the actions of the small transport pilot reckless and inexplicable, and the incident reinforces the value of VFR flight following.

Original NASA ASRS Text

Title: CLOSE PROX GA-SMA GA-SMT ON AIRWAY SAME DIRECTION.

Narrative: ON THE EVENING OF 1/FRI/91, I WAS PROCEEDING N ON V287 S OF PORTLAND, OR, IN AN SMA. I WAS CRUISING AT 110 KTS TAS, VFR AT 7500' MSL, AND I WAS RECEIVING VFR FLT FOLLOWING FROM ZSE. IT WAS FULLY DARK OUT, BUT CONDITIONS WERE CLR, WITH UNRESTRICTED VISIBILITY. 15 DME FROM THE UBG VOR, INBND ON THE 183 DEG R, I HEARD CENTER ADVISED A TWIN SMT THAT I HAD TFC, AN SMA, '12 O'CLOCK, SAME ALT, SAME DIRECTION.' THE SMT PLT RESPONDED THAT HE WAS LOOKING. CENTER THEN CALLED ME TO ADVISE OF A 'TWIN SMT, SAME ALT AND DIRECTLY BEHIND.' I ACKNOWLEDGED THAT I WAS ALSO LOOKING. CENTER AGAIN CALLED THE TWIN SMT TO ADVISE THE TFC 'IS 12 O'CLOCK, SAME ALT, SAME DIRECTION, LESS THAN 1 MI, AND YOU'VE GOT 40 KTS ON HIM.' THE SMT THEN CALLED, 'TFC IN SIGHT.' CENTER CALLED ME TO ADVISE OF TFC, 7 O'CLOCK, 1 MI, SAME ALT, SAME DIRECTION. I WAS ABLE TO SPOT THE SMT AND ADVISED CENTER. THE SMT PASSED ME ON THE LEFT, AT A DISTANCE OF APPROX 3/4 MI. IT MAINTAINED A STEADY COURSE WHICH APPEARED TO PARALLEL MINE CLOSELY, WITH NO TENDENCY TO CONVERGE. AS THE SMT PASSED ABEAM OF ME AND MOVED AHEAD TO MY 10 O'CLOCK POS. I MOMENTARILY GLANCED INSIDE THE COCKPIT TO SCAN THE GAUGES AND THEN LOOKED OUT TO SURVEY THE QUADRANTS OF THE SKY AHEAD AND TO THE RIGHT. WHEN I LOOKED BACK TOWARD THE SMT, IT APPEARED TO BE IN A STEEP RIGHT BANK AND WAS CUTTING DIRECTLY ACROSS MY FLT PATH. I TURNED SHARPLY TO THE LEFT TO PASS BEHIND THE SMT AND PULLED UP TO CLB 200'. THE SMT CONTINUED ITS TURN, XING MY ORIGINAL FLT PATH AT WHAT APPEARED TO BE A 90 DEG ANGLE. I ESTIMATE OUR CLOSEST APCH AT LESS THAN 1/4 MI. I BELIEVE THAT THERE IS A SUBSTANTIAL CHANCE WE WOULD HAVE COLLIDED IF I HAD NOT NOTED HIS ACTION IN TIME AND EXECUTED EVASIVE MANEUVERS. I CONSIDER THE ACTIONS OF THE SMT PLT RECKLESS AND INEXPLICABLE, AND THE INCIDENT REINFORCES THE VALUE OF VFR FLT FOLLOWING.

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.