Learning from an owner annual

I used a torque limiting powered screwdriver once on the PK screws into
tinnermans to put my Cessna back together. I learned a lessons after a
flight when several were missing. I use the power screwdriver to run the
screws in and the torque by hand. No problems since.

Ross

wrote:

You know what? I've been through this one so many times, but it's been
a few years, and I just don't have the energy to fight this fight
again.

There is NO "torque-limiting" power screwdriver-type tool that has both
the ability to prevent over-tightening, and allow sufficient "torque"
to be applied to screws installed into aircraft nutplates.

A slightly boogered screw or nutplate will NOT be tightened
sufficiently, or else other screws will be over-tightened-there is NO
middle ground.

In most cases, a quality torque-limiting screwdriver set at minimal
torque can be used by an experienced operator to run screws and
initially secure panels. The final "ginch" needs to be performed by a
human that knows what the **** he/she is doing.

There is a large portion of the "certified technician" population that
isn't smart enuff to use the proper bit for the type of screw to be
r/r'd, let alone to use power to drive it. It's not much of a stretch
to say that this applies to owner-performed maintenance also.

TC

The disassembly of the aircraft is part of the annual
inspection that needs to be performed by or under close
supervision the AI, the reassembly can be done by any A&P or
the owner and approved.



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

"Javier" wrote in message
...
| Its quite depressing to see my plane
| in so many pieces. I've also discovered that its
extreamly irritating
| that the aircraft parts places are closed on weekends.
|
| What I like is when you have everything in neat little
tupperware cups
| underneath the appropriate parts of the plane -- and
then the shop
| moves the plane. Or they pull an extension cord under
your plane, and
| lasso all the parts buckets. Or they get kicked over.
THAT is my pet
| peeve about doing an annual.
|
|
| Get your mechanic to come to your hangar.
|
| This worked really well for me, I had the plane all taken
apart,
| lubricated, etc., by the time Jim came over and did his IA
thing.
|
| No parts were lost, the plane wasn't pushed around, etc.
Worked really well.
|
| Of course, I'm having one hell of a time finding a Jim
Equivalent Person
| here in NC now, so I'm slowly starting to fret about this
year's annual.
|
| Say Jim, I send you an airline ticket...
|
| -jav

Jim you might try this http://www.frappr.com/


"RST Engineering" wrote in message
.. .
I don't mind setting it up and writing it, but I'd prefer it not be a
subset of the RST webpage (i.e. www.rstengineering.com/ownerannual or
something like that). How can we do this on the cheap, whether it be a
standalone or a subset of some other website?

Jim




"Javier" wrote in message
...
RST Engineering wrote:
Do you s'pose a website dedicated to names & contact info for IAs that
will do owner assisted annuals would be a good thing? Maybe with a
little info about the mech like price structure, do it in your own
hangar, etc?

That'd be superrific!

How can I help get this online?

-jav

Private wrote:
"Jim Macklin" wrote in message
news:EZF9g.20244$ZW3.18025@dukeread04...
I've heard of owners replacing the standard fasteners with
nice shiny stainless steel screws. Trouble is you can get
dissimilar metal galvanic reactions and then you have to
drill them out.


I am aware of galvanic corrosion, which often corrodes aluminum when it is
in contact with steel, especially if in the presence of moisture and even
more especially moisture with salt. The use of stainless fasteners should
AFAIK greatly reduce corrosion of the fasteners but am unaware of any change
to the galvanic corrosion rates on the aluminum. Are you suggesting an
increase in galvanic action between a stainless fastener and a plain steel
nut? Please expand.

What I have heard is this. If you use a carbon steel screw in the
aluminum structure, the corrosion occurs on the steel screw (rusted
screws). To correct the problem, you just replace the screws. If you
use stainless screws, this changes the galvanic status of the
connection to where the aluminum becomes the metal that corrodes. This
means that if you allow corrosion to occur, the aluminum structure
around the screw is what corrodes instead of the screw. To correct this
situation, you have the aluminum structure around the screw to replace,
which is much more involved and expensive than just replacing the
screws.

I would also appreciate comment on the use of thread lubricants like
'Nevr-Seize' which IMHO allow increased clamping force and also greatly
reduce thread seizing from corrosion.

Use of a good corrosion preventative like corrosion X or ACF-50 should
prevent any corrosion of the structure, if you keep it applied every
annual.

"RST Engineering" wrote in message .. .
I don't mind setting it up and writing it, but I'd prefer it not be a subset of the RST webpage (i.e.
www.rstengineering.com/ownerannual or something like that). How can we do this on the cheap, whether it be a
standalone or a subset of some other website?

Jim




Maybe Jay's folks could sponsor it?

"Private" wrote in message
news:yu2ag.165036$7a.147100@pd7tw1no...

"Jim Macklin" wrote in message
news:EZF9g.20244$ZW3.18025@dukeread04...
I've heard of owners replacing the standard fasteners with
nice shiny stainless steel screws. Trouble is you can get
dissimilar metal galvanic reactions and then you have to
drill them out.


I am aware of galvanic corrosion, which often corrodes aluminum when it is
in contact with steel, especially if in the presence of moisture and even
more especially moisture with salt. The use of stainless fasteners should
AFAIK greatly reduce corrosion of the fasteners but am unaware of any
change to the galvanic corrosion rates on the aluminum. Are you
suggesting an increase in galvanic action between a stainless fastener and
a plain steel nut? Please expand.

I would also appreciate comment on the use of thread lubricants like
'Nevr-Seize' which IMHO allow increased clamping force and also greatly
reduce thread seizing from corrosion.

All it takes for corrosion to begin is two dissimilar metals and a bit of
dirty moisture (obtainable free from polution and humidity). Even two
pieces aluminum of different alloys can cause corrosion. AC43-13, which
every owner should have a copy of, has an excellent section on corrosion.

Also, isn't the DC motor sparks thrown around inside a power screw driver a bit of a safety hazard?


wrote in message oups.com...
You know what? I've been through this one so many times, but it's been

"Jim Macklin" wrote in message news:_9S9g.20789$ZW3.7907@dukeread04...
New fasteners are cheaper than the labor to inspect and
clean old fasteners.




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



I don't know...I come pretty cheap! ;-)

(".Blueskies." wrote)
Maybe Jay's folks could sponsor it?


Jay needs to consider (somehow) separating that enormously popular video
page of his ...from the Inn's $$$ making page.

"The server is down" (whatever the message is) --- more than once in a while
these days.


Montblack
...maybe it's only on my end?

That's one reason shops use pneumatic drills and grinders.



".Blueskies." wrote in
message
. com...
| Also, isn't the DC motor sparks thrown around inside a
power screw driver a bit of a safety hazard?
|
|
| wrote in message
oups.com...
| You know what? I've been through this one so many times,
but it's been
|
|