Medium Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 20
Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Procedure
I was given Aircraft X descending on ILS 25L.  Due to volume I slowed the aircraft.  I advised the Stadium ATCS who was given Aircraft Y on a parallel routing and slightly behind Aircraft X; on ILS 24R; that I was slowing my aircraft (Aircraft X); per SOP.  Evidently the STAR ATCS did not get visual separation in time; or block altitude in sufficient time to maintain separation with Aircraft X.  This is a common procedure at LA. These aircraft were given to Downey & Stadium by the same previous ATCS (Feeder).  This ATCS is well aware of the volume and can see if the sectors are overloaded to the point that they are being slowed while still in Feeders airspace (this event).  Although the Feeder Controller delivered the aircraft with at least minimum separation; it would have been appropriate in my opinion for the Feeder ATCS to have obtained visual separation with these two aircraft before transferring communication; instead of transferring that responsibility to Stadium; who undoubtedly was busy themselves with aircraft approaching minimum separation as they approached the runway; and thus preventing this loss of separation.  Unfortunately; work ethic can not be trained.
SCT Controller reports of a loss of separation between two aircraft on final due to the other arrival sector not attaining visual separation or saving 1;000 feet as required.