A B767 flight crew tries to avoid traffic that the ARTCC radar controller at brasilia center had mentioned. PIC and first officer thought the controller said, '...turn left....' TCASII intervenes and after it is all over the controller had only advised them, '...do not turn left....'

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Attributes
ACN	393461
Time
Date	199802
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : brs
State Reference	FO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : sbbs tower : lax
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	other : unknown
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	393461
Person 2
Affiliation	company : air carrier
Function	other personnel other
Qualification	pilot : commercial pilot : instrument
ASRS Report	393460
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other other spatial deviation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 18000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Error
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Brasilia center, FL330. Brs/169 degree radial/90 NM. At AB26Z we heard brasilia center, 124.4, to say, turn left conflicting traffic FL330. We did so by turning 30 degrees left and asked if that heading was sufficient to avoid the traffic 4 times. Center never answered. At 20 NM the traffic showed up on our TCASII screen and we turned further left to heading of 120 degrees. At this time center told us to turn right at the same time we picked up the traffic visually. This was followed by a TA and RA telling us to descend. We descended approximately 500 ft until we received a 'clear of conflict.' we then proceeded back on course and altitude. Brasilia center asked why we turned left. Center stated that they said, 'do not turn left, conflicting traffic FL330.'

Original NASA ASRS Text

Title: A B767 FLC TRIES TO AVOID TFC THAT THE ARTCC RADAR CTLR AT BRASILIA CTR HAD MENTIONED. PIC AND FO THOUGHT THE CTLR SAID, '...TURN L....' TCASII INTERVENES AND AFTER IT IS ALL OVER THE CTLR HAD ONLY ADVISED THEM, '...DO NOT TURN L....'

Narrative: BRASILIA CTR, FL330. BRS/169 DEG RADIAL/90 NM. AT AB26Z WE HEARD BRASILIA CTR, 124.4, TO SAY, TURN L CONFLICTING TFC FL330. WE DID SO BY TURNING 30 DEGS L AND ASKED IF THAT HEADING WAS SUFFICIENT TO AVOID THE TFC 4 TIMES. CTR NEVER ANSWERED. AT 20 NM THE TFC SHOWED UP ON OUR TCASII SCREEN AND WE TURNED FURTHER L TO HDG OF 120 DEGS. AT THIS TIME CTR TOLD US TO TURN R AT THE SAME TIME WE PICKED UP THE TFC VISUALLY. THIS WAS FOLLOWED BY A TA AND RA TELLING US TO DSND. WE DSNDED APPROX 500 FT UNTIL WE RECEIVED A 'CLR OF CONFLICT.' WE THEN PROCEEDED BACK ON COURSE AND ALT. BRASILIA CTR ASKED WHY WE TURNED L. CTR STATED THAT THEY SAID, 'DO NOT TURN L, CONFLICTING TFC FL330.'

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.