I recieved a call the other day from a gentlemen wanting to know if we could help him. He stated that he 'broke' a fitting. Well generally this is no big deal, but sure, send us the hose and we'll look at it. Well it arrived and as I suspected, the nut was broken at the flare from overtorque. Thats only part of the story. This nut was an inexpensive 'imposter' nut, not even a red anodized AN spec nut.
There are ALOT of these around, crimped to hoses by the race car parts vendors. Plated brass stems and collars, and nuts, possibly from 5052O aluminum. Im NOT criticizing them, but most dont do aviation spec work. Some even state, not for 'aviation use' in their literature. Some of you question us and our use of Mil Spec stainless nuts and stems. This is an excellent reason. YES, its costs more, but the assemblies are more reliable. This assembly was an oil pressure hose, and an inflight failure would be potentially catastrophic in several ways.
So, in conclusion, he'll get new assemblies for both the oil and fuel pressure hoses.
Tom
There are ALOT of these around, crimped to hoses by the race car parts vendors. Plated brass stems and collars, and nuts, possibly from 5052O aluminum. Im NOT criticizing them, but most dont do aviation spec work. Some even state, not for 'aviation use' in their literature. Some of you question us and our use of Mil Spec stainless nuts and stems. This is an excellent reason. YES, its costs more, but the assemblies are more reliable. This assembly was an oil pressure hose, and an inflight failure would be potentially catastrophic in several ways.
So, in conclusion, he'll get new assemblies for both the oil and fuel pressure hoses.
Tom
