An air carrier widebody transport used its TCASII for traffic separation in the lateral plane vice t...

Attributes
ACN	270425
Time
Date	199405
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	msl bound lower : 10000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pdx
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other cruise other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 16000 flight time type : 600
ASRS Report	270425
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 8000 flight time type : 1200
ASRS Report	270429
Events
Anomaly	conflict : airborne less severe non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer was flying aircraft, level at 10000 ft. Approach gave right turn to 270 degree. Captain asked if #1 for approach. Reply was 'roger, have one VFR at 12 O'clock, 9500 ft, when clear will clear for visual.' VFR aircraft showed on TCASII at 2 and a half NM, 12 O'clock, 400 ft below. Not being able to see visually, first officer asked me if he could turn right and put VFR aircraft on our left wing. I said go ahead and called approach control and said we were turning right to avoid traffic. No response from approach, VFR approximately 1 M and TCASII showing 300-400 ft below and still no visual. Told approach once again we were in a turn, no response. As VFR passed on left on TCASII and before we could begin a turn back to original heading, approach called and wanted to know why we turned. Attempted to explain, approach became confrontational. We landed and I called approach control supervisor on phone, explained why I turned. He indicated no problem and I told him I did not have time to ask for a vector.

Original NASA ASRS Text

Title: AN ACR WDB USED ITS TCASII FOR TFC SEPARATION IN THE LATERAL PLANE VICE THE VERT.

Narrative: FO WAS FLYING ACFT, LEVEL AT 10000 FT. APCH GAVE R TURN TO 270 DEG. CAPT ASKED IF #1 FOR APCH. REPLY WAS 'ROGER, HAVE ONE VFR AT 12 O'CLOCK, 9500 FT, WHEN CLEAR WILL CLEAR FOR VISUAL.' VFR ACFT SHOWED ON TCASII AT 2 AND A HALF NM, 12 O'CLOCK, 400 FT BELOW. NOT BEING ABLE TO SEE VISUALLY, FO ASKED ME IF HE COULD TURN R AND PUT VFR ACFT ON OUR L WING. I SAID GO AHEAD AND CALLED APCH CTL AND SAID WE WERE TURNING R TO AVOID TFC. NO RESPONSE FROM APCH, VFR APPROX 1 M AND TCASII SHOWING 300-400 FT BELOW AND STILL NO VISUAL. TOLD APCH ONCE AGAIN WE WERE IN A TURN, NO RESPONSE. AS VFR PASSED ON L ON TCASII AND BEFORE WE COULD BEGIN A TURN BACK TO ORIGINAL HDG, APCH CALLED AND WANTED TO KNOW WHY WE TURNED. ATTEMPTED TO EXPLAIN, APCH BECAME CONFRONTATIONAL. WE LANDED AND I CALLED APCH CTL SUPVR ON PHONE, EXPLAINED WHY I TURNED. HE INDICATED NO PROB AND I TOLD HIM I DID NOT HAVE TIME TO ASK FOR A VECTOR.

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 air carrier widebody transport used its TCASII for traffic separation in the lateral plane vice the vertical.