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05-28-2017, 03:42 PM
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Join Date: Feb 2012
Location: Prosser,WA
Posts: 272
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Removing the cowling for preflight inspection
I removed the cowling to find this.
https://www.dropbox.com/s/c6nhzudyew...2000.jpeg?dl=0
It was a lesson learned for me to pull cowling more often. I sensed something was wrong due to last flight on run up the aux charge was a negative. It had been approx 15 hours since I had cowl off and no indication of a issue as I was next to the alternator changing the oil filter. The fact that the alternator had come apart was not as alarming as the fact it was resting on the oil filter and on its way to wear a hole into the the oil filter. I have not looked at what caused it to come apart but I suspect either loose internal bolts or possible thread strip.
Thought I would share as something to look for
__________________
Jack Maljaars
Rv10
N819DJ flying. 350hrs +
Dues 2015 pd
Last edited by Jackm : 05-28-2017 at 03:49 PM.
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05-29-2017, 04:59 AM
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Join Date: Feb 2005
Posts: 1,082
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Good catch.
I looked at the picture before reading the rest of the post and it took me a moment to see the b/u alternator. A habit I have always done is when I check the oil on pre-flight I look through the door for a visual of anything that can be seen. Two reasons; first to see if anything is out of place, missing, or sprayed and second to see the oil filter and the hours visibly written on it for when it needs to be changed.
__________________
Mike
JAMES AIRCRAFT.com
Flying - RV8 Hot Rod "Drone Killer"
Flying - RV8 "Look'n Good"
RV4 - FAST & FUN! Rebuilt, Flown, Sold
RV-7A Built, Flown, Sold
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05-29-2017, 09:05 AM
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Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,370
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I always do a sniff test in addition to see if anything like oil or fuel is particularly strong smelling under the cowling.
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05-29-2017, 09:39 AM
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Join Date: Jan 2005
Location: NC25
Posts: 3,507
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Who was the manufacture of your standby alternator?
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Gary A. Sobek
NC25 RV-6 Flying
3,400+ hours
Where is N157GS
Building RV-8 S/N: 80012
To most people, the sky is the limit.
To those who love aviation, the sky is home.
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05-29-2017, 09:42 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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I always liked the idea of a direct drive alternator. I never liked the center of mass so far from the mount.
Please let us know how the manufacturer responds.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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05-29-2017, 11:33 AM
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Join Date: Jan 2016
Location: Sugar Land, TX
Posts: 406
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Perhaps a little off topic, but has anyone modified the top cowl on an RV to allow it to be quickly and easily opened on one or both sides for a quick look as a part of every pre-flight?
My current airplane is a Grumman which allows me to pop the cowl with just 2 latches and open it on its top hinge to inspect the engine. I was taught to do this every time as part of my pre-flight, and it does allow me to confirm no oil or fuel leaks, no hoses rubbing or other possible problems.
I would like to have a similar ability in the RV-10 I'm currently building, rather than just the small oil door opening. However I haven't determined if this is practical. My current thinking it to build it per the plans for now, and then perhaps try to modify it after Phase 1 when I have a flying aircraft and time to experiment.
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Dave Macdonald
RV-10 First Flight April 1, 2020.  Currently in Phase 1
2020 VAF Dues Paid
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05-29-2017, 12:07 PM
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Join Date: Feb 2005
Location: LSGY
Posts: 3,198
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Gary Newsted
Gary Newsted has/had an RV-9 with a cowl that opened - it was really well done, and allowed easy inspection. He had a Subaru in there, so didn't need the baffles - that might have made things a bit easier. I think this would be a very nice mod, as I find removing the cowl to be a bit of a pain now, and I'm sure once I paint, it will be really tricky.
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05-29-2017, 12:19 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,156
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Quote:
Originally Posted by rv8ch
Gary Newsted has/had an RV-9 with a cowl that opened - it was really well done, and allowed easy inspection. He had a Subaru in there, so didn't need the baffles - that might have made things a bit easier. I think this would be a very nice mod, as I find removing the cowl to be a bit of a pain now, and I'm sure once I paint, it will be really tricky.
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Haven't heard that name for a while... And, a "lobster pot" for an air cleaner!
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Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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05-29-2017, 04:25 PM
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Join Date: Feb 2012
Location: Prosser,WA
Posts: 272
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Yes it is plane power....I covered the label because I am not interested in negative feedback against the manufacturer...they have been good to me and it did have 456 hrs on it.
That is one thing with RV10 cowl is not much to see through oil door.
__________________
Jack Maljaars
Rv10
N819DJ flying. 350hrs +
Dues 2015 pd
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