Prop Feathers and Engine Shuts down after landing????????

Today I was flying my Twin Comanche PA30 everything was great until after
landing. Once I had the wheels on the ground I pulled the power back to idle,
about three seconds or so after I pulled the power back the prop feathered and
the engine shut down. I let the engine cool down for about 30 min then started
the engine right up. Everything was running great. So I took off and flew
around for a while then came back to land, this time after I landed I put
the power back up to 1500 rpm, the oil temp was right below redline the oil
was at 50psi then the prop feathered and the engine shut down again. This also
happened to me yesterday. Every time I land the prop feathers and the engine
shuts down . Everythings always great until after landing. I only have 40
hours on the engine. Could anyone please help me out? Has this ever happened
to anyone before? Does anyone have any ideas on what it could be thanks for
everyone’s help.

This is only a guess but may make some sense. Some CS props will go full
pitch if oil pressure is lost, others will to to minimum pitch with no oil
pressure. You said that the oil temperature was high. (an indication of low
oil level). Also how is the oil pressure just before it shuts down? Being
at idle already, full pitch could make enough drag to stall the engine.
OTOH, if the engine stalled first, the lack of oil pressure would cause the
prop to feather too. Make sure the oil is the right viscosity too. In planes
with oil inversion systems, it's important that you have the type of prop
that goes to full pitch because the pressure drop during the transition to
inverted would cause an engine overspeed if it was the type that went to
minimum pitch. Not that yours has an inversion system, but it's nice to know
which prop you have. Let me know how you make out, I will be reading the
other replies too but am curious to answer to your problem.
Wayne

"AIR ADVENTURE82" wrote in message
...
Today I was flying my Twin Comanche PA30 everything was great until after
landing. Once I had the wheels on the ground I pulled the power back to
idle,
about three seconds or so after I pulled the power back the prop feathered
and
the engine shut down. I let the engine cool down for about 30 min then
started
the engine right up. Everything was running great. So I took off and
flew
around for a while then came back to land, this time after I landed I
put
the power back up to 1500 rpm, the oil temp was right below redline the
oil
was at 50psi then the prop feathered and the engine shut down again. This
also
happened to me yesterday. Every time I land the prop feathers and the
engine
shuts down . Everythings always great until after landing. I only have
40
hours on the engine. Could anyone please help me out? Has this ever
happened
to anyone before? Does anyone have any ideas on what it could be thanks
for
everyone's help.

Since the original poster indicated they were flying a twin, they most
definitely have a prop which feathers if oil pressure is lost, otherwise
single engine handling could become even more exciting than usual. Of
course, someone somewhere doubtless knows of a counter example. For a
single, the reverse is usually true: the prop goes to fine pitch if you lose
oil pressure.

That being said, high oil temperature and low oil pressure are definitely
clues. What's curious is that you don't see this behavior just idling. If
low oil levels were the culprit, I'd expect the same thing to happen after a
ground runup. I think it's time to talk to an A&P.

mark

"Wayne" wrote in message
...
This is only a guess but may make some sense. Some CS props will go
full
pitch if oil pressure is lost, others will to to minimum pitch with no oil
pressure. You said that the oil temperature was high. (an indication of
low
oil level). Also how is the oil pressure just before it shuts down? Being
at idle already, full pitch could make enough drag to stall the engine.
OTOH, if the engine stalled first, the lack of oil pressure would cause
the
prop to feather too. Make sure the oil is the right viscosity too. In
planes
with oil inversion systems, it's important that you have the type of prop
that goes to full pitch because the pressure drop during the transition to
inverted would cause an engine overspeed if it was the type that went to
minimum pitch. Not that yours has an inversion system, but it's nice to
know
which prop you have. Let me know how you make out, I will be reading the
other replies too but am curious to answer to your problem.
Wayne

"AIR ADVENTURE82" wrote in message
...
Today I was flying my Twin Comanche PA30 everything was great until
after
landing. Once I had the wheels on the ground I pulled the power back to

idle,
about three seconds or so after I pulled the power back the prop
feathered
and
the engine shut down. I let the engine cool down for about 30 min then
started
the engine right up. Everything was running great. So I took off and
flew
around for a while then came back to land, this time after I landed I
put
the power back up to 1500 rpm, the oil temp was right below redline the
oil
was at 50psi then the prop feathered and the engine shut down again.
This
also
happened to me yesterday. Every time I land the prop feathers and the
engine
shuts down . Everythings always great until after landing. I only have
40
hours on the engine. Could anyone please help me out? Has this ever
happened
to anyone before? Does anyone have any ideas on what it could be
thanks
for
everyone's help.

"AIR ADVENTURE82" wrote in message ...
Today I was flying my Twin Comanche PA30 everything was great until after
landing.

What oil are you using? Warm temperatures and a too light weight oil can
cause low pressures.

Shouldn't the prop feather when you lose oil pressure (on a twin)? Sounds
like the prop is behaving normally to me. More likely you are having some
kind of problem with your throttle.

Thanks for everyone’s help. I was told by my A&P today to swap the governors
from the right to the left engine and take it up to see if the left engine
feathers and shuts down. Friday morning IM going to go fly and see what
happens. I have about 40 hours on the right engine. Today I also drained the
oil and flushed the engine. I cut open the oil filter and found some small
metal particles. I used a funnel with a screen when I drained the
oil and found no metal particles. I also took the screen off the governor and
found no metal particles. When I drained the fluid out of the engine I also
found no metal
particles. All the cylinders are 80/80.

By the way the engine feathered and shut down at 1000rpm,1500rpm,1700rpm,
50psi and oil temp below redline.

Thanks for everyone’s help once again and I will let everyone know what
happens

Hope you don't have two separate, overlapping, problems. Yikes, now it's
both engines !! :-(

--
Montblack

("AIR ADVENTURE82" wrote)
Thanks for everyone's help. I was told by my A&P today to swap the
governors
from the right to the left engine and take it up to see if the left engine
feathers and shuts down. Friday morning IM going to go fly and see what
happens. snip

Hi everyone today I took my pa30 up and went around the airport once then
landed and none of the engines feathered and shut down. So i went up for about
an hour then landed and BOTH engines feathered and shut down??????? We are
still trying to find out what this is.

Both engines were holding 42psi so when we checked them yesterday.

I just talked to the prop guy and he told me that the stop pins in both props
were very sticky and hes going to clean and lub them up. Also i had the
governor checked and it needs an overhaul.