PMR service analyzer. Clean up flange, probe, filter probe, diaphragm pump from dirty dust. Replace seal for filter probe 2 at 443 2K1 result reading O2 decrease from 3.34 % to 2.54 % also replace connector sample line at diaphragm pump 463 2K1 result reading O2 decrease from 4.16 % to 3.26 % ( YOGA & ADI  )