DT3547/3548: Undershoot.DT3547/3548 reported with undershoot symptom. RS event record analysis shows BCP abnormalities on 3548. Please investigate and follow up, thanks. Fault timing: 1510hrs, 1556hrs & 1743hrs dated 14/4/2021. ~~~~~ 3547/3548 reported with undershoot symptom. RS event record analysis shows BCP abnormalities on 3548. Please investigate and follow up, thanks. Fault timing: 1510hrs, 1556hrs & 1743hrs dated 14/4/2021.  1547 found A1 parking brake intermittently jammed. Replaced #1547 A1 brake shoe. Notif 2267223 raised to RSW & train to be transferred to BSD.  Lee PT/Shafie 44301 Notif 2267223 Name                          : UPD Support Team EMU / Equipment / Location    : 1547 / A1 Parking Brake Description of fault / cause  : A1 Parking Brake Intermittent                                    Jammed Required Rectification        : Required Servicing on 1547 A1                                    Parking Brake.