503/504 air leak 3 bars per 5 minutes wh ~~~~~ To continue rectification.  2504 A1 & #1504 A2/B3 manifolds replaced. Function test - OK. Air leak test : Doors Opened - 0.55 bar/5 min                 Doors Closed - 0.50 bar/5 min  Au TK 44293 503/504 air leak 3 bars per 5 minutes when doors are opened. Please check & rectify. Doors :- 1504 A2,B3. 2504 A1. 2503 A3,B2,B4. 1503 A2,B1,B3,B4. 3503 B3.  503/504 found air leak at the following door manifold : #3503 - B3 #1503 - A2/B1/B3/B4 #2503 - A3/B2/B4 #2504 - A1 #1504 - A2/B3 Replacement done for EMU 503. OPS 20 raised to follow-up on EMU 504.  Alan/Lee PT/Shafie 44292