What a rip off

Here is another rip.

537961. TCM bolt
 
Stewartb said:
Want to shock yourself with airplane part prices? Look up a Cessna 180-185 oil filter adapter. :)
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Try to buy the plastic cover over the gear emergency crank in a Bonanza. It's a formed piece of ABS plastic, bowl shaped maybe 5x5in.
 
weilke said:
Try to buy the plastic cover over the gear emergency crank in a Bonanza. It's a formed piece of ABS plastic, bowl shaped maybe 5x5in.
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That just screams “owner supplied part” and “3D printer”. That’s interior junk that won’t be causing you any structural or propulsion problems.
 
Tom-D said:
That isn't the issue here, I set the standard for my engines, New OEM parts are the norm, They are available that is what gets used.
I really doubt you can find a new OEM wheel bearing for a J-3, so the aftermarket Timkins are used.
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If you don't like the price of OEM parts, then lower your standards. You seem to be complaining about something that you actively promote. Confusing.
 
JAWS said:
If you don't like the price of OEM parts, then lower your standards. You seem to be complaining about something that you actively promote. Confusing.
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Miss the point again, Aye!
 
Checkout_my_Six said:
nuts, bolts, and fasteners are common parts....what part of that is AN?
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To answer your question you must understand the difference between a manufacturers specific part number and a common AN hardware number.
When you can explain that, you'll answer your own question.
 
Tom-D said:
Miss the point again, Aye!
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That specific parts made in the thousands cost more than those made in the millions?

I was once challenged on why I wanted to change a turbine retention bolt, because it is "expensive". I said 1) it is scored and 2) it holds your $50,000 turbine into your $500,000 engine that is installed in your $6,000,000 aircraft and 3) it is $200. Expensive can be subjective.
 
Many times the manufacturer will use a common AN part modify it to meet their usage, and attach their part number to it. Any other party making that part must have Parts Manufacturing Authority - PMA- and that is only approved by the FAA. - FAA/PMA.
 
So yes, to put to rest the question, I just paid $120.00 for 4 bolts and shipping. That's better than paying the widow.
 
JAWS said:
That specific parts made in the thousands cost more than those made in the millions?

I was once challenged on why I wanted to change a turbine retention bolt, because it is "expensive". I said 1) it is scored and 2) it holds your $50,000 turbine into your $500,000 engine that is installed in your $6,000,000 aircraft and 3) it is $200. Expensive can be subjective.
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Problem with your theory is, these are 80 year old engines, the manufacturer has not supported them for small parts for a very long time, the once $.25 bolt is now difficult to find, and costs $25.00 when you do.
 
timwinters said:
Same goes with my 182's wheel bearings. When it's time to replace them my A&P sends me down to NAPA with the part number.
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I've never been able to make that exact cross. Would you mind patching me the NAPA p/n so I can "compare the two"??
 
Tom-D said:
Problem with your theory is, these are 80 year old engines, the manufacturer has not supported them for small parts for a very long time, the once $.25 bolt is now difficult to find, and costs $25.00 when you do.
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Cost of doing business in 2018 I guess. Bet you won't throw those away again! ;)
 
JAWS said:
Cost of doing business in 2018 I guess. Bet you won't throw those away again! ;)
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Well here is the kicker,, I tear down old engines, some have the wrong bolts installed. normally this cost is passed on, but this time ??
 
Tom-D said:
To answer your question you must understand the difference between a manufacturers specific part number and a common AN hardware number.
When you can explain that, you'll answer your own question.
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don't need to....the heads are marked.
 
Tom-D said:
Well here is the kicker,, I tear down old engines, some have the wrong bolts installed. normally this cost is passed on, but this time ??
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If you are being asked to repair or OH someone's engine and you discover the wrong parts inside, the owner should be notified of the issue and given an estimate of the cost to make it right. The responsibility should always rest with the owner.

Why should the maintainer get to eat the cost of fixing someone elses screw up or the liability of "letting it go"? Especially with critical things like an oil pump.

If the screw up is yours, then own it.
 
weirdjim said:
I've never been able to make that exact cross. Would you mind patching me the NAPA p/n so I can "compare the two"??
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Are you trying to cross a Cleveland part number to a Timken? I’ve found that to be next to impossible. Once upon a time I found a parts list for wheel bearings that had Timken part numbers on it and what wheels they fit but haven’t been able to find it again. I think it was McFarlane that had the list.

Anyway, the easiest way is to get the wheel off and look at the part numbers on the bearings and races. Timken doesn’t change them when they become an airplane part. Your local bearing shop should be able to give you a hand from there.

What I’ve found interesting is that there is maybe a $2 difference between the PMA marked parts and what you find at the parts stores. Hardly worth the effort.
 
I went to the local bearing shop, he asked what it was from, he didn't need to know that, but for some reason I told him the truth, he shoved the bearing back to me and said "go to the airport to buy aircraft parts", I learned my lesson, now they have been on a trailer
 
mondtster said:
Are you trying to cross a Cleveland part number to a Timken? I’ve found that to be next to impossible. Once upon a time I found a parts list for wheel bearings that had Timken part numbers on it and what wheels they fit but haven’t been able to find it again. I think it was McFarlane that had the list.

Anyway, the easiest way is to get the wheel off and look at the part numbers on the bearings and races. Timken doesn’t change them when they become an airplane part. Your local bearing shop should be able to give you a hand from there.

What I’ve found interesting is that there is maybe a $2 difference between the PMA marked parts and what you find at the parts stores. Hardly worth the effort.
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You do need to be careful. Timken does have PMA and non-PMA bearings of the same part number. The PMA ones have the suffix "20629" added. Supposedly they have been through additional QA steps.

https://www.mcfarlaneaviation.com/media/documents/wheel-parts-cross-reference.pdf

For me, if the IPC shows a 13889 wheel bearing, I am good going to NAPA. That is what Cessna engineers designed and used before PMA was around.
 
JAWS said:
You do need to be careful. Timken does have PMA and non-PMA bearings of the same part number. The PMA ones have the suffix "20629" added. Supposedly they have been through additional QA steps.

For me, if the IPC shows a 13889 wheel bearing, I am good going to NAPA. That is what Cessna engineers designed and used before PMA was around.
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Wrong... Cessna use a KOYO bearing.

And it was a manufacturer's specific part.

And Timken has no PMA
 
upload_2018-6-9_12-16-43.png Item #11. Looks Timken-ish to me.
 
mondtster said:
What I’ve found interesting is that there is maybe a $2 difference between the PMA marked parts and what you find at the parts stores. Hardly worth the effort.
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Well, except that when you have your plane torn apart at annual, and find that you need a new bearing, you'll still have the wheel back on in a few hours if you run down the street for the bearing. OTOH, it could cost you a few days delay if dealing with an aviation supplier unless you want to spend another $50 for overnight shipping and then the cost difference suddenly becomes more like 5x.
 
Tom-D said:
So, that's a part number ?
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Part Number: 13889. Description: Cone - Bearing. Vendor Code: CFP. Nose wheel bearings used on my 150, which uses a Cleveland 40-76 model wheel since day one. Clip is from my parts manual.

Why so hard to believe?
 
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