EMU 521/522 Air leak test failed 1.0 Bar ~~~~~ To follow up.  521/522 replaced the following items :
#3522 - water tank. #2522 - bogie 1 & 2 air suspension test points. #2521 - bogie 2 BCP test point. #1521 - bogie 2 BCP test point. #3521 - bottom directional v/v.