JonJay
Well Known Member
Original post link here http://www.vansairforce.com/community/showthread.php?t=54763&highlight=sticky+mixture
At 325 hours, a mere 40 hours later, my mixture control started getting stiff again. A quick call to Precision and it was on its way back to the factory on their dime. They where very apologetic and insisted although they had a few of these types of failures on their Bendix line, even fewer on the SliverHawk, none had ever been returned for the same repair later.
Now, here is the really strange part. A day later I get a call from them. "where you able to get idle cut off?" "Yes", where you able to lean normally? "Yes". "Well, that's impossible. There is a plate in the mixure assembly and it was installed backwards. Has anyone else been inside this unit?" "No, I took it off my flying airplane and shipped it back to you". "Well, that is impossible. Also, we found the mixture contol was not sticking at all."
That is pretty much where the conversation ended. Now, he never called me a liar directly, but....since it is impossible that my working unit could work, well, impossible is impossible. I told him I would be happy to send him copies of my logs showing that I flew a few days before I removed the unit and shipped it. However, the conversation was over.
My theory is that someone at Precision is trying to cover their butt. It was not rebuilt properly the first time, or who knows what. But impossible is impossible and my airplane had been flying for 40 hours by the grace of God or some other kind of devine intervention.
If anyone that cruises these forums knows anything about the internals of the mixture control part of the SilverHawk, maybe I can get this mystery solved.
I expect my rebuilt unit back from them today.
PS - the original problem was sited as incorrect type of grease. That was not what they told me this time. It was an assembly process problem that allowed a seal to wipe the grease away. They changed the procedures on how they install the seals but the grease is the same.
At 325 hours, a mere 40 hours later, my mixture control started getting stiff again. A quick call to Precision and it was on its way back to the factory on their dime. They where very apologetic and insisted although they had a few of these types of failures on their Bendix line, even fewer on the SliverHawk, none had ever been returned for the same repair later.
Now, here is the really strange part. A day later I get a call from them. "where you able to get idle cut off?" "Yes", where you able to lean normally? "Yes". "Well, that's impossible. There is a plate in the mixure assembly and it was installed backwards. Has anyone else been inside this unit?" "No, I took it off my flying airplane and shipped it back to you". "Well, that is impossible. Also, we found the mixture contol was not sticking at all."
That is pretty much where the conversation ended. Now, he never called me a liar directly, but....since it is impossible that my working unit could work, well, impossible is impossible. I told him I would be happy to send him copies of my logs showing that I flew a few days before I removed the unit and shipped it. However, the conversation was over.
My theory is that someone at Precision is trying to cover their butt. It was not rebuilt properly the first time, or who knows what. But impossible is impossible and my airplane had been flying for 40 hours by the grace of God or some other kind of devine intervention.
If anyone that cruises these forums knows anything about the internals of the mixture control part of the SilverHawk, maybe I can get this mystery solved.
I expect my rebuilt unit back from them today.
PS - the original problem was sited as incorrect type of grease. That was not what they told me this time. It was an assembly process problem that allowed a seal to wipe the grease away. They changed the procedures on how they install the seals but the grease is the same.
