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I heard a rumour that should the AD go through, we will only start receiving cranks 12 months from now :(
Anyone else with first hand info on this? Would?ve loved to get back in the air after lockdown as we aren?t allowed to fly during our lockdown in South Africa. Frustrating to say the least! |
Interesting, can you share the source of that information? But it doesn't surprise me...my engine builder says there are a limited number of companies producing crankshafts for Lycoming, Superior and ECi.
Dave |
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So don?t quote me on this as it is far from first hand info, but hopefully it won?t take as long. If the risk was negligibly small, I would?ve been flying by now. But not sure what the risk is. |
My day job is in oilfield compression, and we are having a hard time sourcing crankshafts for our compressors as well. There are just a small number of shops with the ability to do this work, and things get backed up sometimes. I can only imagine the headaches the FAA process would add to that.
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I accessed the AD proposal and docket and it was lacking in detail information/documentation for the determination of root cause. Nothing on the engine specifications or hours. One failure was 1/4" subsurface, which screams metallurgy and/or heat treat to me. I can not see how a surface site layer has anything to do with that. 99% of all part loading have peak stresses on the surface of the part. |
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So has this actually turned into an AD now? Or is it still in the NPRM stage?
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Still an NPRM.
ds |
The 60-day extension period has come and gone. Any news from the FAA or Superior regarding the matter?
Does anyone know if Superior has been working on this? (not sure what the conditions in the US currently is with regards to lockdown etc from COVID-19) |
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Last week I emailed Bill Ross at Superior, spoke with the FAA's engineer and called AOPA as well.
Nothing new from Superior - they disagree with the AD and Bill says they're working with the FAA. The FAA engineer says the AD is working its way through the FAA's AD alimentary canal (my words, not his :)). He left me with the impression that it will go forward as-is but nothing is certain until posted to the Federal Register. Disappointingly, AOPA had nothing to say even though they previously asked for an extension. ds |
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Good evening JP,
Unfortunately, I don't have any better information...sorry! I know it's frustrating. This has been going on for months now and I decided to forge ahead on my own path. Happy to tell you more via PM or email - rv701ed at gmail. Cheers, Dave |
Does anyone have any updates on this?
I've been flying my airplane as normal during this, which means lots of formation, some acro, and a few multi-hour cross countries here and there. |
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