B757 crew had TCASII RA in sllp class a.

Attributes
ACN	489474
Time
Date	200010
Day	Thu
Local Time Of Day	0601 To 1200
Place
State Reference	FO
Altitude	msl bound lower : 32000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	489474
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne critical non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

TCASII RA. At approximately XA25Z on oct/thu/00, traveling from lpb to vvi on ua 304 and level at FL330 we received a traffic traffic message from TCASII. The screen indicated an aircraft flying in the opposite direction, within the 10 mi scale 300 ft below our aircraft and climbing. The TCASII commanded a descent at approximately 1200 FPM. The autoplt was disconnected and a descent begun. At approximately FL320 we received a monitor vertical speed, and the other aircraft was visually sighted above us. It looked like a B727, but we were unable to identify it. We notified la paz center of our response to the TCASII advisory and said we were returning to FL330. We said that the aircraft had climbed through our altitude. Center then began a conversation in spanish with another aircraft and it sounded like he mentioned our airlines several times. We can only assume he was talking to the other aircraft involved. We returned to our previous altitude and continued to our destination with no further discussions with center.

Original NASA ASRS Text

Title: B757 CREW HAD TCASII RA IN SLLP CLASS A.

Narrative: TCASII RA. AT APPROX XA25Z ON OCT/THU/00, TRAVELING FROM LPB TO VVI ON UA 304 AND LEVEL AT FL330 WE RECEIVED A TFC TFC MESSAGE FROM TCASII. THE SCREEN INDICATED AN ACFT FLYING IN THE OPPOSITE DIRECTION, WITHIN THE 10 MI SCALE 300 FT BELOW OUR ACFT AND CLBING. THE TCASII COMMANDED A DSCNT AT APPROX 1200 FPM. THE AUTOPLT WAS DISCONNECTED AND A DSCNT BEGUN. AT APPROX FL320 WE RECEIVED A MONITOR VERT SPD, AND THE OTHER ACFT WAS VISUALLY SIGHTED ABOVE US. IT LOOKED LIKE A B727, BUT WE WERE UNABLE TO IDENT IT. WE NOTIFIED LA PAZ CTR OF OUR RESPONSE TO THE TCASII ADVISORY AND SAID WE WERE RETURNING TO FL330. WE SAID THAT THE ACFT HAD CLBED THROUGH OUR ALT. CTR THEN BEGAN A CONVERSATION IN SPANISH WITH ANOTHER ACFT AND IT SOUNDED LIKE HE MENTIONED OUR AIRLINES SEVERAL TIMES. WE CAN ONLY ASSUME HE WAS TALKING TO THE OTHER ACFT INVOLVED. WE RETURNED TO OUR PREVIOUS ALT AND CONTINUED TO OUR DEST WITH NO FURTHER DISCUSSIONS WITH CTR.

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.