 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
flysrv10(at)gmail.com
Guest
|
 Posted: Thu Jun 25, 2009 2:37 pm Post subject: a lesson learned |
 |
|
On Saturday during my upwind leg at Bartow, FL, my co-pilot was the
first to notice oil on the windshield. Oil pressure/temp remained
stable so I landed immediately and taxied to the maintenance shop.
The windshield was partially covered with a film of what looked like
oil and the front of the cowl was also partially covered with the
same. My first thought was that I had lost the shaft seal but Bill
from the maintenance shop took a quick look and identified it as
grease.
We discovered that the spring in one of the grease zerks at the prop
hub had broken and grease content was sprayed out. Bill said that he
has even seen the zerks break from the hub all together.
I had never heard of this before and wanted to let everyone know of
the possibility. I can now identify what grease looks like on the
windshield. I consider myself and my plane very, very lucky. I am
almost sure that it had happened a few minutes later, I would have
been looking for an off-filed landing.
I am seriously considering replacing the zerks with plugs when they
are not being used.
Do not archive.
--
Rob Kermanj
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
 |
gengrumpy(at)aol.com
Guest
|
| Posted: Thu Jun 25, 2009 5:08 pm Post subject: a lesson learned |
|
|
I had a very similar experience 2nd flight after condition inspection
was complete (I added grease during the process). Happened soon after
takeoff. My thoughts were much like Rob's.
One of the local mechanics said this was not at all unusual following
grease servicing on props.
I replaced the zerk and now carry a spare zerk plus a plug in my tool
bag. Might just use all plugs next ACI.
One key visual indicator here that can help you tell the difference
between grease and oil - the grease does not run up the windscreen
like oil does. So if you don't see the stuff streaming up the canopy,
it's probably grease and not oil.....gives a bit more breathing room
looking for a place to set down and inspect.
grumpy
N184JM
On Jun 25, 2009, at 5:36 PM, Rob Kermanj wrote:
| Quote: |
On Saturday during my upwind leg at Bartow, FL, my co-pilot was the
first to notice oil on the windshield. Oil pressure/temp remained
stable so I landed immediately and taxied to the maintenance shop.
The windshield was partially covered with a film of what looked like
oil and the front of the cowl was also partially covered with the
same. My first thought was that I had lost the shaft seal but Bill
from the maintenance shop took a quick look and identified it as
grease.
We discovered that the spring in one of the grease zerks at the prop
hub had broken and grease content was sprayed out. Bill said that he
has even seen the zerks break from the hub all together.
I had never heard of this before and wanted to let everyone know of
the possibility. I can now identify what grease looks like on the
windshield. I consider myself and my plane very, very lucky. I am
almost sure that it had happened a few minutes later, I would have
been looking for an off-filed landing.
I am seriously considering replacing the zerks with plugs when they
are not being used.
Do not archive.
--
Rob Kermanj
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
flysrv10(at)gmail.com
Guest
|
| Posted: Thu Jun 25, 2009 5:40 pm Post subject: a lesson learned |
|
|
I had greased the prop about 30 hrs before. Better read the prop book
and follow grease instructions closely. Wher did you find the plug?
I understand it is an unusual size.
Do not archive.
On Thu, Jun 25, 2009 at 8:59 PM, Miller John<gengrumpy(at)aol.com> wrote:
| Quote: |
I had a very similar experience 2nd flight after condition inspection was
complete (I added grease during the process). Happened soon after takeoff.
My thoughts were much like Rob's.
One of the local mechanics said this was not at all unusual following grease
servicing on props.
I replaced the zerk and now carry a spare zerk plus a plug in my tool bag.
Might just use all plugs next ACI.
One key visual indicator here that can help you tell the difference between
grease and oil - the grease does not run up the windscreen like oil does.
So if you don't see the stuff streaming up the canopy, it's probably grease
and not oil.....gives a bit more breathing room looking for a place to set
down and inspect.
grumpy
N184JM
On Jun 25, 2009, at 5:36 PM, Rob Kermanj wrote:
>
>
> On Saturday during my upwind leg at Bartow, FL, my co-pilot was the
> first to notice oil on the windshield. Oil pressure/temp remained
> stable so I landed immediately and taxied to the maintenance shop.
>
> The windshield was partially covered with a film of what looked like
> oil and the front of the cowl was also partially covered with the
> same. My first thought was that I had lost the shaft seal but Bill
> from the maintenance shop took a quick look and identified it as
> grease.
>
> We discovered that the spring in one of the grease zerks at the prop
> hub had broken and grease content was sprayed out. Bill said that he
> has even seen the zerks break from the hub all together.
>
> I had never heard of this before and wanted to let everyone know of
> the possibility. I can now identify what grease looks like on the
> windshield. I consider myself and my plane very, very lucky. I am
> almost sure that it had happened a few minutes later, I would have
> been looking for an off-filed landing.
>
> I am seriously considering replacing the zerks with plugs when they
> are not being used.
>
> Do not archive.
>
> --
> Rob Kermanj
>
>
|
--
Rob Kermanj
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
|
| Posted: Thu Jun 25, 2009 5:48 pm Post subject: a lesson learned |
|
|
Vastly overstated problem. Every Hartzell has the zerks. The prop is supposed to be greased annually. If there were a problem, you would have already seen the AD. No problems over 700 hours &10 years flying behind two different Hartzells and greasing them myself. Care in removing and installing the zerks goes a long ways. There should not be any back pressure at all when pumping grease into the hub, and grease should be coming out the removed zerk as soon as hub is full. If you get any pressure into the hub you risk damaging the seals on the blades.
On Thu, Jun 25, 2009 at 5:59 PM, Miller John <gengrumpy(at)aol.com (gengrumpy(at)aol.com)> wrote:
[quote] --> RV10-List message posted by: Miller John <gengrumpy(at)aol.com (gengrumpy(at)aol.com)>
I had a very similar experience 2nd flight after condition inspection was complete (I added grease during the process). Happened soon after takeoff. My thoughts were much like Rob's.
One of the local mechanics said this was not at all unusual following grease servicing on props.
I replaced the zerk and now carry a spare zerk plus a plug in my tool bag. Might just use all plugs next ACI.
One key visual indicator here that can help you tell the difference between grease and oil - the grease does not run up the windscreen like oil does. So if you don't see the stuff streaming up the canopy, it's probably grease and not oil.....gives a bit more breathing room looking for a place to set down and inspect.
grumpy
N184JM
On Jun 25, 2009, at 5:36 PM, Rob Kermanj wrote:
| Quote: | --> RV10-List message posted by: Rob Kermanj <flysrv10(at)gmail.com (flysrv10(at)gmail.com)>
On Saturday during my upwind leg at Bartow, FL, my co-pilot was the
first to notice oil on the windshield. Oil pressure/temp remained
stable so I landed immediately and taxied to the maintenance shop.
The windshield was partially covered with a film of what looked like
oil and the front of the cowl was also partially covered with the
same. My first thought was that I had lost the shaft seal but Bill
from the maintenance shop took a quick look and identified it as
grease.
We discovered that the spring in one of the grease zerks at the prop
hub had broken and grease content was sprayed out. Bill said that he
has even seen the zerks break from the hub all together.
I had never heard of this before and wanted to let everyone know of
the possibility. I can now identify what grease looks like on the
windshield. I consider myself and my plane very, very lucky. I am
almost sure that it had happened a few minutes later, I would have
been looking for an off-filed landing.
I am seriously considering replacing the zerks with plugs when they
are not being used.
Do not archive.
--
Rob Kermanj
|
===========
arget="_blank">http://www.matronics.com/Navigator?RV10-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b]
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD |
|
| Back to top |
|
|
flysrv10(at)gmail.com
Guest
|
| Posted: Thu Jun 25, 2009 6:34 pm Post subject: a lesson learned |
|
|
I remember removing the opposite zerk and pumping grease for a while.
Nothing came out so I gave up and greased a little form the opposite
end. Don't remember any back pressure.
As I mentioned; I had never heard of this until the mechanic said
casually that he has seen it before.
On Thu, Jun 25, 2009 at 9:47 PM, Kelly McMullen<apilot2(at)gmail.com> wrote:
| Quote: | Vastly overstated problem. Every Hartzell has the zerks. The prop is
supposed to be greased annually. If there were a problem, you would have
already seen the AD. No problems over 700 hours &10 years flying behind two
different Hartzells and greasing them myself. Care in removing and
installing the zerks goes a long ways. There should not be any back pressure
at all when pumping grease into the hub, and grease should be coming out the
removed zerk as soon as hub is full. If you get any pressure into the hub
you risk damaging the seals on the blades.
On Thu, Jun 25, 2009 at 5:59 PM, Miller John <gengrumpy(at)aol.com> wrote:
>
>
>
> I had a very similar experience 2nd flight after condition inspection was
> complete (I added grease during the process). Happened soon after takeoff.
> My thoughts were much like Rob's.
>
> One of the local mechanics said this was not at all unusual following
> grease servicing on props.
>
> I replaced the zerk and now carry a spare zerk plus a plug in my tool bag.
> Might just use all plugs next ACI.
>
> One key visual indicator here that can help you tell the difference
> between grease and oil - the grease does not run up the windscreen like oil
> does. So if you don't see the stuff streaming up the canopy, it's probably
> grease and not oil.....gives a bit more breathing room looking for a place
> to set down and inspect.
>
> grumpy
> N184JM
>
> On Jun 25, 2009, at 5:36 PM, Rob Kermanj wrote:
>
>>
>>
>> On Saturday during my upwind leg at Bartow, FL, my co-pilot was the
>> first to notice oil on the windshield. Oil pressure/temp remained
>> stable so I landed immediately and taxied to the maintenance shop.
>>
>> The windshield was partially covered with a film of what looked like
>> oil and the front of the cowl was also partially covered with the
>> same. My first thought was that I had lost the shaft seal but Bill
>> from the maintenance shop took a quick look and identified it as
>> grease.
>>
>> We discovered that the spring in one of the grease zerks at the prop
>> hub had broken and grease content was sprayed out. Bill said that he
>> has even seen the zerks break from the hub all together.
>>
>> I had never heard of this before and wanted to let everyone know of
>> the possibility. I can now identify what grease looks like on the
>> windshield. I consider myself and my plane very, very lucky. I am
>> almost sure that it had happened a few minutes later, I would have
>> been looking for an off-filed landing.
>>
>> I am seriously considering replacing the zerks with plugs when they
>> are not being used.
>>
>> Do not archive.
>>
>> --
>> Rob Kermanj
>>
>>
>>
>>
> ===========
> arget="_blank">http://www.matronics.com/Navigator?RV10-List
> ===========
> http://forums.matronics.com
> ===========
> le, List Admin.
> ="_blank">http://www.matronics.com/contribution
> ===========
>
|
--
Rob Kermanj
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
Dick Sipp
Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI
|
| Posted: Thu Jun 25, 2009 7:42 pm Post subject: a lesson learned |
|
|
Another example of the great operational threads that are now coming up
regularly with our growing fleet of flying aircraft.
The Hartzell manual spells out routine greasing procedures in depth and
includes removing and replacing zerks in the process as well
how much to pump in. Depending on my memory (a dangerous thing) a specific
number of strokes on the pump are called out rather than "filling" to
overflow.
Dick Sipp
40065 N110DV flying
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
MauleDriver(at)nc.rr.com
Guest
|
| Posted: Fri Jun 26, 2009 3:50 am Post subject: a lesson learned |
|
|
Yes it is a great example.
I just read my manual - it calls for 1 ounce of grease or until grease
flows out of the removed fitting, whichever occurs first. 1 ounce
equals aprox 6 pumps from hand grease gun.
Thanks for the learning experience.
'
richard sipp wrote:
| Quote: |
Another example of the great operational threads that are now coming
up regularly with our growing fleet of flying aircraft.
The Hartzell manual spells out routine greasing procedures in depth
and includes removing and replacing zerks in the process as well
how much to pump in. Depending on my memory (a dangerous thing) a
specific number of strokes on the pump are called out rather than
"filling" to overflow.
Dick Sipp
40065 N110DV flying
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
