Narrative:

A near miss occurred during descent to FL150, on ATC frequency 124.9 after gua VOR. A TCASII TA, followed by a resolution command to climb greater than 2000 FPM at approximately FL170, time XA13Z. Full power was applied. The first officer was flying but the captain applied full power and assisted in a more aggressive rate of aircraft nose up pitch attitude change to climb and turn right. At the closest point the TCASII indicated an altitude difference of 100 ft, ezeiza ATC was immediately advised and acknowledged the presence of the other aircraft. We never saw the other aircraft. The passenger were advised of the near miss. After the miss, we commenced a descent to 5000 ft and completed the ragon 1B STAR and a #4 ILS to runway 35 at eze. Company reports were filed. The #2 INS failed during the agressive pullup. A debriefing with flight attendants occurred to explain the event. The first officer was reminded of the necessity to shift from the 'smooth airline pilot' mode to a more aggressive control input to avoid a collision. This is the second near miss I have experienced in the eze area (see report attached dated feb/xx/96). I thank god for the inclusion of GPWS and TCASII in air carrier aircraft. TCASII has now saved my life and those of passenger and crew 2 times in 4 months. I remain convinced that minor alterations in the horizontal flight track would reduce the numbers and severity of responsive action, and pray effort will continue to develop horizontal escape maneuvering.

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Original NASA ASRS Text

Title: NMAC. IN FOREIGN AIRSPACE, ARGENTINA, APPARENT CTLR ERROR CAUSED RPTR ACFT TO RECEIVE A TCASII RA WHICH WAS FOLLOWED AGGRESSIVELY. RPTR CAPT ESTIMATES MISS AS 100- 100 FT. WHEN ASKED, CTLR ACKNOWLEDGED THE OTHER TFC. RPTR SAYS IT'S HIS SECOND TIME IN THE BUENOS AIRES AIRSPACE THAT AN NMAC HAS OCCURRED. B747.

Narrative: A NEAR MISS OCCURRED DURING DSCNT TO FL150, ON ATC FREQ 124.9 AFTER GUA VOR. A TCASII TA, FOLLOWED BY A RESOLUTION COMMAND TO CLB GREATER THAN 2000 FPM AT APPROX FL170, TIME XA13Z. FULL PWR WAS APPLIED. THE FO WAS FLYING BUT THE CAPT APPLIED FULL PWR AND ASSISTED IN A MORE AGGRESSIVE RATE OF ACFT NOSE UP PITCH ATTITUDE CHANGE TO CLB AND TURN R. AT THE CLOSEST POINT THE TCASII INDICATED AN ALT DIFFERENCE OF 100 FT, EZEIZA ATC WAS IMMEDIATELY ADVISED AND ACKNOWLEDGED THE PRESENCE OF THE OTHER ACFT. WE NEVER SAW THE OTHER ACFT. THE PAX WERE ADVISED OF THE NEAR MISS. AFTER THE MISS, WE COMMENCED A DSCNT TO 5000 FT AND COMPLETED THE RAGON 1B STAR AND A #4 ILS TO RWY 35 AT EZE. COMPANY RPTS WERE FILED. THE #2 INS FAILED DURING THE AGRESSIVE PULLUP. A DEBRIEFING WITH FLT ATTENDANTS OCCURRED TO EXPLAIN THE EVENT. THE FO WAS REMINDED OF THE NECESSITY TO SHIFT FROM THE 'SMOOTH AIRLINE PLT' MODE TO A MORE AGGRESSIVE CTL INPUT TO AVOID A COLLISION. THIS IS THE SECOND NEAR MISS I HAVE EXPERIENCED IN THE EZE AREA (SEE RPT ATTACHED DATED FEB/XX/96). I THANK GOD FOR THE INCLUSION OF GPWS AND TCASII IN ACR ACFT. TCASII HAS NOW SAVED MY LIFE AND THOSE OF PAX AND CREW 2 TIMES IN 4 MONTHS. I REMAIN CONVINCED THAT MINOR ALTERATIONS IN THE HORIZ FLT TRACK WOULD REDUCE THE NUMBERS AND SEVERITY OF RESPONSIVE ACTION, AND PRAY EFFORT WILL CONTINUE TO DEVELOP HORIZ ESCAPE MANEUVERING.

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.