DT check 501/502 air leak fail 0.9/5min. ~~~~~ DT check 501/502 air leak fail 0.9/5min.     Check and found the following defective pneumatic components: 1)#1502 no 1 end coupler MR hose ruptured. 2)#2501 bogie 1 a/s leveling v/v air leaking. 3)#3501 Air compressor heavy oil leaking. 0020 raise to rectify defects. #3501 Semi-permanent coupler air leaking.Raise notification to RSW for rectification. Not: 2275728 raise to RSW. Checked by Joshua. 13/05/21 To follow up with air leak rectification Check and found #1502 no 1 end coupler MR hose leaking,C/O ok. #2501 bogie 1 A/S leveling v/v air leak-replaced ok. #3501 Air compressor heavy oil leak replaced ok. Air compressor cut in-8.6bar and cut out-10.4bar.Charging time 2min 30sec,Air leak test 5min/0.6bar. #2501 levelling v/v- New s/n: 1050305  Old s/n: 1034248 Not: 2276431 Raise. #3501 Air Compressor- New s/n: 120-1001 Old s/n: 106 Not: 2276429 Raise. Done by Sanip/Koh/Joshua Lee.  15/05/21