Which
makes a more reasonable solution one that isolates one or two crooks or crinks, but those needing to be vulnerable to the cause of fault. And vulnerable in the sense of simultaneous failure (~8 secs.). I look suspiciously at FCOC, and the plumbing around it. What a swell place for ice crystals to cascade into a clump and choke the life out of our A/C. Or like a cocktail shaker to block flow due to agitation and foaming. Boeing has the answer in the test cell(s).
Airfoil