TC reported MR pressure keeps fluctuating between 8.2 - 10 bar. No compressor fault present. No air discharge sound or any abnormalities. ~~~~~ To check line 18 Comp M2-M2 continuity.  681/682 checked continuity between Line 18 to 18 between DT-M1 / M1-M2 - OK. Line 75 to 175 between M2-M2 checked - OK. Resistance checked between 0.9 - 1.2 ohm.  Lee JC 44538 3682-TC reported MR pressure keeps fluctuating between 8.2 - 10 bar. No compressor fault present. No air discharge sound or any abnormalities.  3682 checked/found CG cut-in at 8.3 bar. Replaced CG & function test cut-in = 8.6 bar, cut-out = 10.45 bar. Air leak test = 0.2 bar/5 min. Compressor charging up time = 2.04 mins. #3681 checked/found compressor charging up time = 3 min 48 sec. Replaced compressor oil filter & micromesh oil filter. Re-tested compressor charging up time = 2 min 6 sec. OPS 20 raised to follow-up.  Alan/Lee PT/Shafie 44536