Narrative:

On visual approach to runway 31L at psp. Radar at psp OTS, no TA's available. Unknown traffic transiting area eastbound through traffic pattern at psp. Conflict as reporting aircraft was descending on base leg. TCASII RA followed. No passenger injuries or other problems.

Google
 

Original NASA ASRS Text

Title: B737-400 FLC RESPONDS TO TCASII RA LNDG AT PSP.

Narrative: ON VISUAL APCH TO RWY 31L AT PSP. RADAR AT PSP OTS, NO TA'S AVAILABLE. UNKNOWN TFC TRANSITING AREA EBOUND THROUGH TFC PATTERN AT PSP. CONFLICT AS RPTING ACFT WAS DSNDING ON BASE LEG. TCASII RA FOLLOWED. NO PAX INJURIES OR OTHER PROBS.

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.