2640 - Parking brake release fault. To check & rectify. (Train prep) ~~~~~ 2640 - Parking brake release fault.(Train prep)  2640 having FC 717 parking brake release fault in TIMS. Found air leaking at silencer behind brake frame. All brakes at bogie 2 unable to release when put to coast. Air leaking sound present at axle 4 TBU W PB. Isolated both parking and service brake hose at bogie 2, air leak at brake frame stopped. Normalised service brake hose and plugged PB hose at supply side, air found to be escaping from non supply side of PB pipe, indicating TBU W PB internal leak. Isolated #2640 BIC2, axle 3 and 4 manual PB release and blanked PB hose. Notif (2622820) raised to c/o #2640 axle 4 TBU W PB.  Sarma/Alan/Anand/Shafie 45505 Notif 2622820 Name                    : SUPPORT 1 Date of Occurrence      : 01/08/2024. Last Service Date       :   EMU/Equipment/Location  : 2640 / TBU WITH PAKING BRAKE / AXEL 4 Description             : INTER L AIR LEAK CAUSING BOGIE 2                                BRAKE TO STAY ON. PARKING BRAKE PIPE                             BLANK, BIC 2 ISOLATE ON BRAKE PANEL &                            PB MANUAL RELEASE ACTIVATED ON AXEL 3                            & 4. Measurement             :   Required Rectification  : REQUIRED CHANGEOUT.