DT525/526:UNDERSHOOTEvent record analysis show BCP abnormalities on both cab. Please follow up ~~~~~ Change out both 3525 and 3526 ACU.Function test brake pressure all ok.Security check all ok. 3525 acu new :1036/053,old :1044/026 notif  no 2252594. 3526 acu new :1024/006, old : 1912/080 notif no  2252595 . MURALI/ROSLI/AKHBAR/GA SAN  28.02.2021