3528 DT check having APS fault.(Code 430 ~~~~~ Check Tims confirmed #3528 show FC 430 and APS show as O .Power/no power test done ok.APS running all ok.Swapped APS controller from #3528 to #1528-fault persist at #3528.Swapped APS relay unit from #3528 to #3527-fault persist at #3528.Checked wire T181 from APS to LJB to Tims connector continuity ok.Joint investigation with signals projects and Thales legacy Decommissioning team found TN24 to #3528 APS OL.Thales rectify checked ok.Tims fault cleared and APS operation ok. Done by Joshua.  23/03/21