B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 241
Communication Breakdown; Confusion; Distraction; Troubleshooting
ATC Issue All Types; Inflight Event / Encounter Other / Unknown
Flight Crew Requested ATC Assistance / Clarification
ATC Equipment / Nav Facility / Buildings; Equipment / Tooling
We were handed off from LA Center to Albuquerque Center Sector 45 frequency 124.500. After switching on to 124.500 it was nearly impossible to hear ZAB Controller instructions because 124.500 is also a frequency used by SoCal Approach Control for LAX Arrivals. Repeatedly; aircraft checking in to SoCal Approach on 124.500 blocked out the ZAB Controller. It was to the point that I was seriously concerned we could not hear what the ZAB Controller wanted us to do. ZAB Sector 45's location is at the western boundary of ZAB airspace. Aircraft climbing out of LAS have line of sight with aircraft descending into LAX thus it is very easy for the two to generate radio transmission conflict on the same frequency of 124.500.
A Captain reported having trouble hearing the Controller on a frequency he was assigned. This frequency is also an arrival frequency for LAX arrivals. The Captain reported of bleed over the frequency and wasn't sure if he was receiving all the transmissions from ZAB Center.