Narrative:

With ZLA, a clearance to 12000 ft was given for 15 NM east of baret intersection. A vector was then given to head 190 degrees and contact socal approach. Some difficulty in contacting approach, descent was passing 13000 ft for 12000 ft. Traffic was noted on TCASII with a resulting RA. After reaction to RA was completed, contact with ZLA was established. Reported RA action. Center responded that socal approach would have had lower so it shouldn't have been a problem. Murphy's law applies here -- if it is the most inopportune time it will! Considering time element it is doubtful socal could have given a lower altitude to avoid the RA. A frequency change with a potential traffic conflict should be delayed until traffic conflict is resolved.

Related reports:

Google
 

Original NASA ASRS Text

Title: A DSNDING A 320 RECEIVES A TCASII RA WHILE OUT OF 13000 FT FOR 12000 FT. FREQ CHANGE TO SCT APCH CTLR INCOMPLETE DUE TO TFC VOLUME. UNRPTED TFC CONCERNED RPTR. MZB, CA.

Narrative: WITH ZLA, A CLRNC TO 12000 FT WAS GIVEN FOR 15 NM E OF BARET INTXN. A VECTOR WAS THEN GIVEN TO HEAD 190 DEGS AND CONTACT SOCAL APCH. SOME DIFFICULTY IN CONTACTING APCH, DSCNT WAS PASSING 13000 FT FOR 12000 FT. TFC WAS NOTED ON TCASII WITH A RESULTING RA. AFTER REACTION TO RA WAS COMPLETED, CONTACT WITH ZLA WAS ESTABLISHED. RPTED RA ACTION. CTR RESPONDED THAT SOCAL APCH WOULD HAVE HAD LOWER SO IT SHOULDN'T HAVE BEEN A PROB. MURPHY'S LAW APPLIES HERE -- IF IT IS THE MOST INOPPORTUNE TIME IT WILL! CONSIDERING TIME ELEMENT IT IS DOUBTFUL SOCAL COULD HAVE GIVEN A LOWER ALT TO AVOID THE RA. A FREQ CHANGE WITH A POTENTIAL TFC CONFLICT SHOULD BE DELAYED UNTIL TFC CONFLICT IS RESOLVED.

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.