Narrative:

At the time of the event I was working sector 21 alone. Air carrier X filed lax flipr 3 SID trm to london, had departed lax and was climbing very, very slowly due to its heavy load. I had assigned a heading of 080, which took the aircraft just south of el toro (nzj) TACAN. The event occurred approximately 8 mi southeast of nzj on about the 105 right, at approximately 13,000 MSL. Prior to this I had pointed out the aircraft, because of the slow climb rate, to coast approach pacific and shore sectors, who own 13,000' and below over nzj. Because I knew the next sector had possible VFR traffic, and because air carrier X was exiting my airspace boundary, I issued air carrier X the next sector's frequency. At the time I issued the frequency change, air carrier X was just passing 12,000, I believe. Almost immediately after air carrier X acknowledged, I observed an identify beacon at air carrier X's 10 O'clock and 5 mi (converging). Then I observed the mode C as it climbed through 11,500-12,000 and continued. Then I punched the line to sector 12, who was talking to another aircraft. By the time I was able to tell 12 about the traffic, they were now merging at, as far as I could tell, the same altitude. The targets divided and then, after a few updates, I lost track of the unidentified aircraft. I reported the event to my supervisor. He later told me that he, or another supervisor, had talked to coast approach. They evidently said that they were aware of air carrier X's presence, but that they had stopped their traffic, an IFR fgt beneath air carrier X.

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Original NASA ASRS Text

Title: FGT ACFT BEING WORKED BY ANOTHER FAC CAME IN CLOSE PROX TO AN ACR WHILE BOTH ACFT WERE IN A CLIMB.

Narrative: AT THE TIME OF THE EVENT I WAS WORKING SECTOR 21 ALONE. ACR X FILED LAX FLIPR 3 SID TRM TO LONDON, HAD DEPARTED LAX AND WAS CLIMBING VERY, VERY SLOWLY DUE TO ITS HEAVY LOAD. I HAD ASSIGNED A HDG OF 080, WHICH TOOK THE ACFT JUST S OF EL TORO (NZJ) TACAN. THE EVENT OCCURRED APPROX 8 MI SE OF NZJ ON ABOUT THE 105 R, AT APPROX 13,000 MSL. PRIOR TO THIS I HAD POINTED OUT THE ACFT, BECAUSE OF THE SLOW CLIMB RATE, TO COAST APCH PACIFIC AND SHORE SECTORS, WHO OWN 13,000' AND BELOW OVER NZJ. BECAUSE I KNEW THE NEXT SECTOR HAD POSSIBLE VFR TFC, AND BECAUSE ACR X WAS EXITING MY AIRSPACE BOUNDARY, I ISSUED ACR X THE NEXT SECTOR'S FREQ. AT THE TIME I ISSUED THE FREQ CHANGE, ACR X WAS JUST PASSING 12,000, I BELIEVE. ALMOST IMMEDIATELY AFTER ACR X ACKNOWLEDGED, I OBSERVED AN IDENT BEACON AT ACR X'S 10 O'CLOCK AND 5 MI (CONVERGING). THEN I OBSERVED THE MODE C AS IT CLIMBED THROUGH 11,500-12,000 AND CONTINUED. THEN I PUNCHED THE LINE TO SECTOR 12, WHO WAS TALKING TO ANOTHER ACFT. BY THE TIME I WAS ABLE TO TELL 12 ABOUT THE TFC, THEY WERE NOW MERGING AT, AS FAR AS I COULD TELL, THE SAME ALT. THE TARGETS DIVIDED AND THEN, AFTER A FEW UPDATES, I LOST TRACK OF THE UNIDENTIFIED ACFT. I REPORTED THE EVENT TO MY SUPVR. HE LATER TOLD ME THAT HE, OR ANOTHER SUPVR, HAD TALKED TO COAST APCH. THEY EVIDENTLY SAID THAT THEY WERE AWARE OF ACR X'S PRESENCE, BUT THAT THEY HAD STOPPED THEIR TFC, AN IFR FGT BENEATH ACR X.

Data retrieved from NASA's ASRS site as of August 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.