Understanding fuel servo maintenance

10 hours? And you said OK to that? I was hoping you were a little
smarter than that ;-)

We had our servo replaced at annual and were charged 2 hours for the
R&R. Did you look at what's involved it the R&R? Not much. And yes the
servos are adjustable. Matter of fact one of the ways you can tell it is
time for a new one is when the adjutsment screw is turned all the way
out and no more adjustment is left.

The servos are good for about 1000 hours before they need rebuilt so if
yours has around that many hours than you probably just wasted your
money trying to nickel and dime the situation instead of just rebuilding
yours.

As far as "needing" to know the root cause of everything, does it really
matter? Do you need to know why you have a headache before taking some
asprin? :-)

Jon Kraus
'79 Mooney 201
4443H @ UMP


Also, each R&R is
costing me about 10 hours of A&P time.

As far as "needing" to know the root cause of everything, does it really matter? Do you need to know why you have a headache before taking some asprin? :-)

Sometimes it can save your life.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.

Jon Kraus wrote:
10 hours? And you said OK to that? I was hoping you were a little
smarter than that ;-)

They had to pull all the intake and exhaust stacks to gain access.

The servos are good for about 1000 hours before they need rebuilt so if
yours has around that many hours than you probably just wasted your
money trying to nickel and dime the situation instead of just rebuilding
yours.

I do have 1000 SFNEW on this engine and servo. I'm surprised the FAA
doesn't have an AD requiring service severy 1000 hours if the units are
this prone to just flat out fail like that.

But this seems to imply that these are very dangerous parts. If this
servo had "unadjusted" itself in flight I would probably be in the
hospital right now. I just got lucky that it "unadjusted" itself during
runup (the engine quit and would only run if the mixture was held right
at idle cut off, moving the mixture forward would flood the engine
out). Engine ran great one day, engine failed the next.

As far as "needing" to know the root cause of everything, does it really
matter? Do you need to know why you have a headache before taking some
asprin? :-)

I just need to know that its not going to need to be adjusted again
while I'm flying over the Sierras. I like to fly to some very remote
areas of Mexico. Taking a 2 week donkey ride back to the states through
the desert isn't appealing.


-Robert

On 11/21/06 09:23, Robert M. Gary wrote:

[ snip ]


I just need to know that its not going to need to be adjusted again
while I'm flying over the Sierras. I like to fly to some very remote
areas of Mexico. Taking a 2 week donkey ride back to the states through
the desert isn't appealing.

I hear you can ride on the tops of trains ;-\



-Robert

Jon Kraus wrote:
10 hours? And you said OK to that? I was hoping you were a little
smarter than that ;-)

We had our servo replaced at annual and were charged 2 hours for the
R&R.

Just curious, did you already have the lower cowl dropped during the
R&R? If you went through the lower cowl vs. removing the intake stacks
I usually get charged 3 hours just to drop and return the lower cowl. I
can usually do it myself but it takes me 4-5 hours myself.

-Robert