26 Apr 2024, 04:46 [ UTC - 5; DST ]
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Username Protected
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 10:02 |
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Joined: 05/31/13 Posts: 1235 Post Likes: +602 Company: Docking Drawer Location: KCCR
Aircraft: C425
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Quote: Plan is to fix the most pressing stuff in Oregon Was the pre buy being done at Aero Air?
_________________ ATP, CFI-I, MEI http://www.dockingdrawer.com
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 11:33 |
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Joined: 06/28/09 Posts: 14154 Post Likes: +9102 Location: Walnut Creek, CA (KCCR)
Aircraft: 1962 Twin Bonanza
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Username Protected wrote: Plan is to fix the most pressing stuff in Oregon, then ferry her back here and try to do as much as I can locally and at a slower pace. At this point would it not make more sense to just fix everything and be done so you can fly her and enjoy, rather than putting yourself through more pain with continuing the slow approach?
_________________ http://calipilot.com atp/cfii
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 12:28 |
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Joined: 12/17/13 Posts: 6360 Post Likes: +5544 Location: Hollywood, Los Angeles, CA
Aircraft: Turbo Commander 680V
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Username Protected wrote: Quote: Plan is to fix the most pressing stuff in Oregon Was the pre buy being done at Aero Air? Yes sir.
_________________ Problem is the intelligent people are full of doubt, while the stupid ones are full of confidence.
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 13:10 |
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Joined: 05/31/13 Posts: 1235 Post Likes: +602 Company: Docking Drawer Location: KCCR
Aircraft: C425
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Aero Air is good and will get it fixed but they are not cheap. I did some heavy maintenance on my 500B there (gear and boots). They did a good job but it definitely set me back. What is remaining to be done?
_________________ ATP, CFI-I, MEI http://www.dockingdrawer.com
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 13:21 |
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Joined: 12/17/13 Posts: 6360 Post Likes: +5544 Location: Hollywood, Los Angeles, CA
Aircraft: Turbo Commander 680V
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Username Protected wrote: Aero Air is good and will get it fixed but they are not cheap. I did some heavy maintenance on my 500B there (gear and boots). They did a good job but it definitely set me back. What is remaining to be done? Agreed. They do things right there, but they're pretty strict with stuff, which is great and is as it should be, but when you have an old airframe it can sometimes be like bringing an old house up to the latest building code. The big items are: 1. 3rd stage T-wheel needs replacing for a used one on one engine. Cycled out. 2. New boots on main wing. 3. Needs pressurization leaks chased. 4. Needs props inspected (this is an SB, so optional). Then there's a lots of smaller niggly stuff, but it adds up. The fuel bladders have now been repaired and hopefully they'll not leak anymore. One less thing to deal with. The scary one is the turbine wheel. I have an estimate for that that's manageable, but when they open the engine up it could get worse. Trying to avoid it becoming a full hot when it doesn't need to be.
_________________ Problem is the intelligent people are full of doubt, while the stupid ones are full of confidence.
Last edited on 21 May 2019, 13:25, edited 1 time in total.
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 13:27 |
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Joined: 12/17/13 Posts: 6360 Post Likes: +5544 Location: Hollywood, Los Angeles, CA
Aircraft: Turbo Commander 680V
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Username Protected wrote: Keeping these old turbines flying can be a bit frustrating and expensive, but they sure are great to fly:-) The PT6 is in many ways a better engine when you run them over TBO or to do hots on them. They seem to be a lot cheaper in general to hot and it can in most scenarios be done on the wing. TPE's need to be cradled and sent off, which adds time and money.
_________________ Problem is the intelligent people are full of doubt, while the stupid ones are full of confidence.
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 13:31 |
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Joined: 12/16/07 Posts: 17637 Post Likes: +21408 Company: Real Estate development Location: Addison -North Dallas(ADS), Texas
Aircraft: In between
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Username Protected wrote: Keeping these old turbines flying can be a bit frustrating and expensive, but they sure are great to fly:-) The PT6 is in many ways a better engine when you run them over TBO or to do hots on them. They seem to be a lot cheaper in general to hot and it can in most scenarios be done on the wing. TPE's need to be cradled and sent off, which adds time and money.
I’ve followed your journey from the beginning and have hoped each step of the way it would go well. One day, we’ll each be standing at the pearly gates and when asked what we have done to distinguish ourselves, we can mention that we maintained a legacy twin turbine on a reasonable budget!
Of course, in addition to other accomplishments.
_________________ Dave Siciliano, ATP
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 13:57 |
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Joined: 01/30/09 Posts: 3356 Post Likes: +1964 Location: $ilicon Vall€y
Aircraft: Columbia 400
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Username Protected wrote: , just underestimated how much money a startup eats. : Boy howdy, am I ever with you there, brother. Not just money, but time too.
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Post subject: Re: Turbine step up? Posted: 21 May 2019, 14:22 |
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Joined: 05/31/13 Posts: 1235 Post Likes: +602 Company: Docking Drawer Location: KCCR
Aircraft: C425
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Quote: Agreed. They do things right there, but they're pretty strict with stuff, which is great and is as it should be, but when you have an old airframe it can sometimes be like bringing an old house up to the latest building code. Good analogy, and very true. Out of all the things on your list one I would defer is the boots. The boots on my 500B were comically old, with all kinds of patches and repairs. But they still inflated and kind of shed ice. I did the whole plane and expected the brand new boots would shed ice much better. But in the end they performed about the same. And the best anti ice on a turbine is all that horsepower, so I would defer boots if you need to save money. Yes the turbine wheel does sound scary. If you can find a used one that sounds like a great idea. I'm not sure a PT6 is all that much better. Yes, it's easy to get at the hot section and you can do it on wing. But PWC has really strict criteria for the CT blades and all kinds of inspections you need to do based on TT, condition, etc. And they cost like $600 each (58 per engine) so not cheap if you have to replace. Your pressurization doesn't make full differential? Are you sure it's caused by leaks and not the bleed air valves? I know nothing about TCAC bleed air valves but I think they all include some kind of regulator which could also be the problem. Having Aero Air fix that would probably be best because they know exactly how to troubleshoot and where to look for the most common problems. As for the props, a commander is the one airframe I always thought was best to have well maintained props. If you lose a blade, it could go right through the cabin. It happened at least once that I know of and killed someone. Good luck man. Sucks especially since you had to endure MK for a while before figuring out it was time to bolt.
_________________ ATP, CFI-I, MEI http://www.dockingdrawer.com
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