Have you created anything "home-made" for your plane? (or a low cost alternative?)

And this is exactly the thread we had a year or so ago, where you said that
you can't put non-certified parts on your production airplane and I said you
can. We went round and round for a week, and we finally agreed to disagree.

Now you are starting the whole damned thing over again.

Jim



Some people may
not understand and might make and install non-certified
parts on their production airplane. It isn't an argument,
it is a caution.

Hey, what cam I say, I'm 60 and don't remember everything.
I also think that it is not legal to install parts
willy-nilly on certified airplanes. I don't intend to worry
about your thin skin either.



--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"RST Engineering" wrote in message
.. .
| And this is exactly the thread we had a year or so ago,
where you said that
| you can't put non-certified parts on your production
airplane and I said you
| can. We went round and round for a week, and we finally
agreed to disagree.
|
| Now you are starting the whole damned thing over again.
|
| Jim
|
|
|
| Some people may
| not understand and might make and install non-certified
| parts on their production airplane. It isn't an
argument,
| it is a caution.
|
|

In article ,
"RST Engineering" wrote:

And this is exactly the thread we had a year or so ago, where you said that
you can't put non-certified parts on your production airplane and I said you
can. We went round and round for a week, and we finally agreed to disagree.

ok, here's my question: Are you saying that I could install any part (certified
or uncertified) I want in my cherokee as long as I have an approval basis
for the installation? or are you saying that no approval basis of the
installation is required?

--
Bob Noel
Looking for a sig the
lawyers will hate

In article ,
"RST Engineering" wrote:

Again, depends entirely on the situation. Give me a ferinstance with all
the particulars.

(what particulars do you need?)

Case 1:

Install a digital OAT probe and display in a cherokee. The part is PMA'd for
certain Beech aircraft but not any cherokee


Case 2:

Install a replacement handle for the seat release in a cherokee. The part
was fabricated (by me) from stock laying around the hangar.


Case 3:

Install new aluminum engine baffling fabricated (by me) from aluminum "scrap".


Case 4:

Install an instrument light dimmer switch (a simple rehostat (or however it's
spelled))

--
Bob Noel
Looking for a sig the
lawyers will hate

Case 1:

Install a digital OAT probe and display in a cherokee. The part is PMA'd
for
certain Beech aircraft but not any cherokee

I'd consider that a minor modification that can be handled on a logbook
entry with an A&P signature. See the last sentence about "instructions for
continued airworthiness". Actually, for a part that isn't required for
flight, I'd not be worried about whether the part was PMA'd at all.




Case 2:

Install a replacement handle for the seat release in a cherokee. The part
was fabricated (by me) from stock laying around the hangar.

21.303(b)(2) gives the owner or the operator the perogative to manufacture
parts for their own aircraft. "manufacturing" does not have to be
physically done by you; if you generate the drawings and take them down to
the local machine shop for fabrication, you are still the "manufacturer".
Again, minor repair UNLESS the installing mechanic can see how a design
change from the original part might get tangled up and inadvertently release
the seat, in which case it isn't a matter of a major repair; it is simply
unairworthy.




Case 3:

Install new aluminum engine baffling fabricated (by me) from aluminum
"scrap".

Minor repair under the watchful eye of the engine mechanic. Airworthiness
depends on how crappy the scrappy was.



Case 4:

Install an instrument light dimmer switch (a simple rehostat (or however
it's
spelled))

Rheostat. If it a replacement for a currently installed rheostat it is a
minor repair if the replacement part is form, fit, and function with the old
part. If it is a modification, I'd like to see some calculations on how hot
it is going to get, what you have done to address the heat generated,
whether the part is rated for the calculated wattage, and all that good
stuff. If it all calculates out properly, minor modification but with the
caveat that a sheet showing "instructions for continued airworthiness" in
the aircraft files (i.e how often inspected, what are you inspecting for,
and all that stuff).

Jim

In article ,
"RST Engineering" wrote:


iow - the answer to my question was yes, any part can be installed
as long as there is an approval basis.



Case 1:

Install a digital OAT probe and display in a cherokee. The part is PMA'd
for
certain Beech aircraft but not any cherokee

I'd consider that a minor modification that can be handled on a logbook
entry with an A&P signature.

the approval basis being the A&P signature

actually, in my case, it was replacing the original OAT probe, I discussed
this with the FSDO prior to the mod and the shop filed a 337.


etc

--
Bob Noel
Looking for a sig the
lawyers will hate

"Jim Macklin" wrote in message
news:g7U_f.2959$8q.2119@dukeread08...
Hey, what cam I say, I'm 60 and don't remember everything.

It's called "having an Alzheimer Moment"... grin

ok, here's my question: Are you saying that I could install any part (certified
or uncertified) I want in my cherokee as long as I have an approval basis
for the installation? or are you saying that no approval basis of the
installation is required?

I actually talked with somebody at my FSDO (CT) about this kind of
thing. We were talking about installing a non-certified backup AH.

1: You can't install a non-certified (NC) part as a required part of a
certified plane. Thus, the NC gyro can't be your only gyro, or be one
in the sacred six position.

2: You can install anything that is not required, so long as the
installation meets the approval of the certified mechanic doing the
installation and signing off on it. This signoff is essentially saying
that the part will not harm the safety or flight charactaristics of the
aircraft. Thus you can install a (NC!) CD player that plugs into the
cigarette lighter. It can be screwed into the panel, so long as the
certificated mechanic signs off on it (saying that it won't, for
example, get in the way of flight controls, fall off at a critical
moment, and that the installation will withstand the same forces the
rest of the airplane is supposed to withstand.

3: He was concerned about connecting directly to the electrical system,
because there can be no assurance that it won't be a flight hazard, but
IIRC he didn't forbid it.

We did not pursue this further because my club went with a certificated
unit. YMMV.

Jose
--
The price of freedom is... well... freedom.
for Email, make the obvious change in the address.

crossposting-snipped

In rec.aviation.piloting, "Jose" wrote in message
. com...
We did not pursue this further because my club went with a certificated
unit.

For the cost of a certified CD player, you could supply everyone on the
plane with an iPod / MP3 player... The earbuds fit nicely inside the ear
cups of a normal aviation headset...

For the cost of a certified CD player, you could supply everyone...

Yes, but this way if there's a crash, we could sue the artist on the CD
that was playing.

It was a backup AH that we installed.

Jose
--
The price of freedom is... well... freedom.
for Email, make the obvious change in the address.