11 and 12 through hose 71 and lines 28 and 26 after a predetermined level of evacuation is achieved valve 27 is closed vacuum pump 25 may be turned off valves 2 3 29 30 31 33 34 67 68 69 and 70 are opened pump 32 is turned on solvent is pumped from solvent tank 21 through line 37 through pump 32 through lines 38 and 28 through hose 71 through aircraft oxygen lines 72 and 5 6 7 8 9 10 11 and 12 through hoses 73 74 75 76 77 78 79 and 80 and through lines 39 and 35 to distillation unit 40 after aircraft oxygen lines 72 5 6 7 8 9 10 11 and 12 are full of solvent valves 3 29 31 33 34 67 68 69 and 70 are closed and valves 41 and 43 are opened cleaning solution is pumped by pump 32 from cleaning solution tank 24 through line 42 through pump 32 through lines 38 and 28 through hose 71 through aircraft oxygen lines 72 and 5 through hose 73 through lines 39 and 44 through desiccant 22 through filter 23 and into cleaning solution tank 24 filter 23 should remove a substantial amount of particles the cleaning solution is pumped by pump 32 through this continuous loop for a predetermined amount of time at a relatively high velocity the velocity through aircraft oxygen lines 72 and 5 is preferably from about 10 to about 30 feet about 3 0 to 9.