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06-08-2014, 01:13 PM
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Join Date: Apr 2006
Location: Lantz,Nova Scotia ,Canada
Posts: 556
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Flaps stopped working. Time to degrease.
My flaps stopped working this morning causing me to draw on my superior piloting skills. I turned around on the taxiway and headed back to the hangar. I'm just as happy it happened while I was still on the ground.
I checked the switch everything was OK there, so I figured it must be grease in the motor or some other problem with it. This is what I found when I took it apart.
I cleaned everything up and reassembled. It seems to be working fine now.

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Paul Tuttle
RV 8
C-FPVT
Flying.
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06-08-2014, 01:24 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Yikes. What a mess. I read the reports of this and pulled mine apart during my build to hopefully avoid this problem. There was a significant excess of grease.
I hope it continues to provide good service.
Larry
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06-08-2014, 02:07 PM
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Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
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Nope - it will be a regular occurrence.....
Ours stops every 6 months or so.
I believe the more current units are better.
__________________
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q
Donated in 2020
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06-08-2014, 02:10 PM
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Join Date: Feb 2006
Location: Eliot, Maine
Posts: 83
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I've cleaned my flap motor twice. I thought I got all of the excess grease the first time but they packed that grease in good. I think the second time was the charm as I haven't had to touch it in over 2 years.
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Claudio Scremin
N221Z RV8A Maine 600+ hrs
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06-08-2014, 06:26 PM
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Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,351
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I wonder if there is a batch of these motors with excessive grease or what.
I pulled mine about at around 420 hours, since I had read this is the typical number of hours before they fail and found there was no grease in the motor. I had not seen one with the grease in the motor but seeing this pix gives me the confidence that I did not have any.
Now watch, as I post this, my flaps will stop working if not for the grease maybe the contacts.
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Mehrdad
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying
Dues paid
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06-08-2014, 09:03 PM
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Join Date: Jan 2005
Location: Twin Cities, MN
Posts: 1,565
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Quote:
Originally Posted by Scremm
I've cleaned my flap motor twice. I thought I got all of the excess grease the first time but they packed that grease in good. I think the second time was the charm as I haven't had to touch it in over 2 years.
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I cleaned mine out at around 50 hours, then again around 90. No trouble since, now at around 270 hrs.
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Brad Benson, Maplewood MN.
RV-6A N164BL, Flying since Nov 2012!
If you're not making mistakes, you're probably not making anything
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06-09-2014, 06:27 AM
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Join Date: Mar 2005
Location: Elkhart, Indiana
Posts: 1,186
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If this problem has been posted before, I apparently missed it. My flap motor HAS to be an old one, since I would have received it with the fuse kit, which would have been around '99 or so.
The motor has functioned flawlessly for 265 hours over the last 5 years, and I've never taken it apart. Just tossing those facts out there for another data point.
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Don McNamara
Peoria, AZ
Builder: RV-8 "Smokey"
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06-09-2014, 07:06 AM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
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Twice in 1750 hours for the Val (actuator vintage ca 2004) - I have never had to clean up the one on Mikey (3,000+ hurs....but who knows what vintage actuator!). Val's flaps are getting a bit slow - I might check it out again.
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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06-09-2014, 08:37 AM
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Join Date: Jan 2005
Location: Houston, TX
Posts: 868
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I must be lucky; my 2004 vintage actuator has 1100 hours on it, never failed or had it apart yet. Maybe I got a good one?
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John Bixby
RV-8 QB sn 82030 - 1750 hrs
O-360-A1D/CS/Pmags
Houston, TX
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06-09-2014, 09:12 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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I have seen a letter or RVator article on this from some years ago. I can not seem to find it, but this was "apparently" limited to a some date range. I just remember it and checked mine. circa 2003.
If flaps get slow this one of the first things to check. The gearbox was apparently stuffed full and it then got hot and migrated.
IIRC
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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