Bad parts

[astjp2]

old info but important on unapproved parts....tim

[Hank Jarrett]

Re: Bad parts

Well, one good thing is that a Rockwell Hardness test leaves a distinct mark on the part. If you have a suspect gear you could look for the test mark from a prior test and should be able to tell if someone did the test already and didn't log it (why some people don't put this kind of test in the logs I will never understand). If I had ANY suspicion I would just get the gear tested. Any machine shop should have or have access to a hardness tester. The hardest part (no pun intended) would be the labor taking the mag on and off and getting the gear off for the test.....then having to time the mags again.

Hank

We had a HUGE problem with counterfeit bolts when I was in the navy. They were making bad hardware in China and they had all the proper markings. Once they were dumped into the bins, they were almost impossible to find. You had to hardness test and conductivity test EVERY STINKING BOLT!

[wmfife]

Re: Bad parts

OMG I just saw the name on the list they give of the parts place that sold a set of mag gears to me in 2006. He advised me to replace the standard gears with hardened ones after I replaced the wood prop with a metal one.

The shop installed them on the mags but (fortunately) has not installed the mags as yet.

Thanks for posting this. And contrary to the listings given in the SAIB, it also applies to Lycoming engines. Or mine at least, as several parts were interchangeable with the A-65.

[Guest]

Re: Bad parts

2006 is not in the date range of 1993 to 1997.

Dave

[wmfife]

Re: Bad parts

It says dates purchased not dates installed.
I've read some real horror stories regarding counterfeit parts including Taylorcraft. Some manage to get into the system despite the most thorough recalls and FAA notices and bulletins.
Thanks Tim for the post. I'm checking mine just to be sure.

[astjp2]

Re: Bad parts

What counterfeit Taylorcraft parts?

[wmfife]

Re: Bad parts

It was some years ago a fellow in NC had a Harer STC on a '40 BC with a C-85 that had a tapered shaft and wood prop. Told me the prop hub on the shaft was manufactured out of tolerance and eventually split in flight from fatigue. Lost the entire prop but managed to glide back and land.

Not a Taylorcraft part per se but one used on many T-Craft.

...Was part of what influenced me to get a Lyc instead of a Cont.

[Guest]

Re: Bad parts

It says dates purchased not dates installed.
I've read some real horror stories regarding counterfeit parts including Taylorcraft. Some manage to get into the system despite the most thorough recalls and FAA notices and bulletins.
Thanks Tim for the post. I'm checking mine just to be sure.

Sure but you had said "sold a set of mag gears to me in 2006" so I assumed 2006.

Either way you are able to figure it out.

Dave

[Guest]

Re: Bad parts

It was some years ago a fellow in NC had a Harer STC on a '40 BC with a C-85 that had a tapered shaft and wood prop. Told me the prop hub on the shaft was manufactured out of tolerance and eventually split in flight from fatigue. Lost the entire prop but managed to glide back and land.

Not a Taylorcraft part per se but one used on many T-Craft.

...Was part of what influenced me to get a Lyc instead of a Cont.

Sometimes good legitimate hubs can be split by over torquing.

[wmfife]

Re: Bad parts

Sure but you had said "sold a set of mag gears to me in 2006" so I assumed 2006.

Either way you are able to figure it out.

Dave

Yes and their name was on the list of companies selling gears for whom "invoices indicated that defective mag gears had been purchased from Fresno Air Parts from Dec. 1993 to Dec. 1997" and who "...may have resold parts to others".

The dates given were for distribution by Fresno to these companies. The dates the parts "may have been resold to others" were not determined.

The bulletin only said parts "...installed from December 1993 to the present..." (time of the bulletin) "...must...be considered suspect". That to me appeared to be an ongoing warning. Vague references to "...work done between December 1993 and December 1997" do not sound conclusive as to whether all these parts were intercepted after this time.

I hope you are right and all were recovered before I bought these. I really hope so.
(Edit) Looking at this one on the L. mag I can see no evidence of any kind of a number.
...Just the plastic bag it came in.

[wmfife]

Re: Bad parts

Sometimes good legitimate hubs can be split by over torquing.

Yet another reason for keeping my flanged O-145. These were *never* built with tapered shafts. Thanks.

[astjp2]

Re: Bad parts

Except for the fact that obtaining parts sucks and they lacked the torque of the continental....

Yet another reason for keeping my flanged O-145. These were *never* built with tapered shafts. Thanks.

[wmfife]

Re: Bad parts

Except for the fact that obtaining parts sucks and they lacked the torque of the continental....

True. There is no free lunch.

But at least the parts you get won't cause a forced landing, they run smoother (my Dad used to run up his Champ to full rpm after mag check and the windows shook like a box of marbles on a bumpy road) ...and how much torque does an A65 have, anyway?

It's true the Continental was more popular with the military. But I served my time. And the Taylorcraft wasn't designed for the military, at least not the '41 Deluxe. It was designed for economical but comfortable travel in style. Worth fighting for.

Both get you where you want to go on about the same amount of avgas in pretty much the same time, but you're less tired in one than the other. Ya pays your money ya takes your choice.

[Guest]

Re: Bad parts

Is the 0-145 a smoother running engine than the A65?

If so any clues as to why?

Just curious.

[wmfife]

Re: Bad parts

It's all in the firing order. Instead of 1-2-3-4 it's 1-3-2-4.
It's the same principle as ANC. The firing frequencies cancel out at cruise to the point the feel is more like a V-12 (well ok sort of...) and you don't get the individual bang of each cylinder.

Some think a loud rough sounding engine with good solid rhythm is cool. My dad even had the collectors removed from his A65 for added power and because "now it sounds like a real airplane", unquote.

Well I think my Lyc sounds like a real airplane when idling & taxiing. I remember that chuckle from when I was a kid at the airport and it is IMO the *cure* for the Cuyuna / Rotax Snowmobile Blues. There are more than one way to do LSA.

Further - volume adds nothing to performance and I am frequently amazed at how far away you can hear a helicopter for its size. This little gem can pass over at a couple thousand+ and barely wake the chickens. And this from an airport that recently re-routed traffic (as they did to my father's field) to address "noise abatement" issues. Right traffic when the wind changes. *sigh*