Narrative:

Air carrier X flying the ILS approach in VMC to lax runway 25L. Somewhere around 15 mi out from lax, approach control pointed out to us air carrier Y at 2 O'clock which was on a right base leg for 24R. Air carrier Y was clearly visible as we continued on our ILS and we anticipated air carrier Y making his right turn to final. He did not make his turn to final. Our aircraft and air carrier Y were on a nearly perfect collision course, but we weren't overly concerned since he was supposed to turn right and fly parallel to us. Not much time was available to us from the time we could determine that air carrier Y was not going to turn and the time for us to get out of his way. At about the time that we were going to climb to avoid the traffic, the TCASII responded with a TA and very shortly with an RA. We climbed from an estimated 3300 ft to 3900 ft as air carrier Y went directly under us. After the climb air carrier Y was again visible at about 8 O'clock and was in a right turn. We stayed at our new altitude as air carrier Y continued his right turn and then passed below us and behind. Approach control advised us when he was clear of us back on our right side and continued our approach visually to runway 25L. Observations and thoughts -- approach control advised us several times of air carrier Y's position and they told us to maintain some altitude (can't remember what altitude) when they realized that air carrier Y wasn't turning to final. I had decided to climb as the best evasive route because we were in large transport and our weight was relatively light and I was sure we could out perform widebody transport under this situation. Also, I figured that some confusion or overloading of duties was probably occurring in the widebody transport cockpit. Supplemental information from acn 244099: I told captain, who was flying, that there was a conflict, he stopped descent at approximately 3300 MSL and climbed to approximately 3800 ft. We did get an RA on TCASII, however, we had air carrier Y visually and did not need TCASII input. Controller was notified of conflict, we were instructed to descend back to 3500 ft and then soon after clearance to complete the approach to runway 25L.

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Original NASA ASRS Text

Title: ACR X TCASII RA HAD NMAC WITH FOREIGN ACR Y NON ADHERENCE TO ATC CLRNC. EVASIVE ACTION TAKEN.

Narrative: ACR X FLYING THE ILS APCH IN VMC TO LAX RWY 25L. SOMEWHERE AROUND 15 MI OUT FROM LAX, APCH CTL POINTED OUT TO US ACR Y AT 2 O'CLOCK WHICH WAS ON A R BASE LEG FOR 24R. ACR Y WAS CLRLY VISIBLE AS WE CONTINUED ON OUR ILS AND WE ANTICIPATED ACR Y MAKING HIS R TURN TO FINAL. HE DID NOT MAKE HIS TURN TO FINAL. OUR ACFT AND ACR Y WERE ON A NEARLY PERFECT COLLISION COURSE, BUT WE WEREN'T OVERLY CONCERNED SINCE HE WAS SUPPOSED TO TURN R AND FLY PARALLEL TO US. NOT MUCH TIME WAS AVAILABLE TO US FROM THE TIME WE COULD DETERMINE THAT ACR Y WAS NOT GOING TO TURN AND THE TIME FOR US TO GET OUT OF HIS WAY. AT ABOUT THE TIME THAT WE WERE GOING TO CLB TO AVOID THE TFC, THE TCASII RESPONDED WITH A TA AND VERY SHORTLY WITH AN RA. WE CLBED FROM AN ESTIMATED 3300 FT TO 3900 FT AS ACR Y WENT DIRECTLY UNDER US. AFTER THE CLB ACR Y WAS AGAIN VISIBLE AT ABOUT 8 O'CLOCK AND WAS IN A R TURN. WE STAYED AT OUR NEW ALT AS ACR Y CONTINUED HIS R TURN AND THEN PASSED BELOW US AND BEHIND. APCH CTL ADVISED US WHEN HE WAS CLR OF US BACK ON OUR R SIDE AND CONTINUED OUR APCH VISUALLY TO RWY 25L. OBSERVATIONS AND THOUGHTS -- APCH CTL ADVISED US SEVERAL TIMES OF ACR Y'S POS AND THEY TOLD US TO MAINTAIN SOME ALT (CAN'T REMEMBER WHAT ALT) WHEN THEY REALIZED THAT ACR Y WASN'T TURNING TO FINAL. I HAD DECIDED TO CLB AS THE BEST EVASIVE RTE BECAUSE WE WERE IN LGT AND OUR WT WAS RELATIVELY LIGHT AND I WAS SURE WE COULD OUT PERFORM WDB UNDER THIS SIT. ALSO, I FIGURED THAT SOME CONFUSION OR OVERLOADING OF DUTIES WAS PROBABLY OCCURRING IN THE WDB COCKPIT. SUPPLEMENTAL INFO FROM ACN 244099: I TOLD CAPT, WHO WAS FLYING, THAT THERE WAS A CONFLICT, HE STOPPED DSCNT AT APPROX 3300 MSL AND CLBED TO APPROX 3800 FT. WE DID GET AN RA ON TCASII, HOWEVER, WE HAD ACR Y VISUALLY AND DID NOT NEED TCASII INPUT. CTLR WAS NOTIFIED OF CONFLICT, WE WERE INSTRUCTED TO DSND BACK TO 3500 FT AND THEN SOON AFTER CLRNC TO COMPLETE THE APCH TO RWY 25L.

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.