Air carrier flight crew reported an airborne conflict with non-participating traffic while on approa...

Attributes
ACN	1627423
Time
Date	201903
Local Time Of Day	1201-1800
Place
Locale Reference	PSP.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Other unknown
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Total 26000
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Conflict Airborne Conflict

Narrative:

RNAV visual arrival into psp for runway 31L. Approaching cekma intersection; ATC called out traffic (north bound) and gave us present heading (265 degrees) & level off at 5000 feet. Traffic was spotted off our right and ATC cleared us for visual. Started descent/ configuring and turned toward ulale intersection. Lost traffic and then it appeared along our projected path and TCAS conflict alert and resolution resulted. TCAS flight path resolution was followed and traffic appeared below us; flying toward us and underneath us. Aircraft changed direction in uncontrolled airspace as we were approaching psp airport flying RNAV visual arrival. Mountains on both side of valley congest arrivals and local traffic. ATC communication for all traffic in the valley; near psp airport would help. Giving VFR traffic greater separation in case of course reversals. Don't lose sight of traffic on visual separation.

Original NASA ASRS Text

Title: Air carrier flight crew reported an airborne conflict with non-participating traffic while on approach to PSP.

Narrative: RNAV visual arrival into PSP for Runway 31L. Approaching CEKMA intersection; ATC called out traffic (north bound) and gave us present heading (265 degrees) & level off at 5000 feet. Traffic was spotted off our right and ATC cleared us for visual. Started descent/ configuring and turned toward ULALE intersection. Lost traffic and then it appeared along our projected path and TCAS conflict alert and resolution resulted. TCAS flight path resolution was followed and traffic appeared below us; flying toward us and underneath us. Aircraft changed direction in uncontrolled airspace as we were approaching PSP airport flying RNAV visual arrival. Mountains on both side of valley congest arrivals and local traffic. ATC communication for all traffic in the valley; near PSP airport would help. Giving VFR traffic greater separation in case of course reversals. Don't lose sight of traffic on visual separation.

Data retrieved from NASA's ASRS site 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.

Air carrier flight crew reported an airborne conflict with non-participating traffic while on approach to psp.