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07-15-2011, 11:20 AM
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Join Date: Nov 2007
Location: NJ
Posts: 1,747
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Define overhaul:
What goes into a C/S prop overhaul and are there any guarantees after the work is performed?
__________________
My ATC opinion is NOT an official FAA recognized opinion, so any advice you get from me is ONLY my opinion.
Track my RV7A!!
Bought my flying -7A
Building an -8! (Fuse)
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07-15-2011, 11:56 AM
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Join Date: Jun 2006
Location: 8I3
Posts: 3,562
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Off the top of my head:
Blade shanks are rolled.
basic blade dimensions checked
Pitch change fork/pitch change blocks checked for wear.
Replace blade bearings/races as necessary if races are brinelled.
Replace blade root roller bearings and guide bushings
Hub zyglo'ed and alodined
Blades dressed
Blades refinished
AD's
New o-rings and teflons
assembly
track checked
static balance
hi/lo pitch stops set
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Please don't PM me! Email only!
Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
Last edited by rocketbob : 07-15-2011 at 11:59 AM.
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07-15-2011, 11:56 AM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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"Overhaul" is generally defined as: disassemble, clean, inspect, replace parts as necessary to meet serviceable limits, reassemble and test.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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07-15-2011, 01:24 PM
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Join Date: Nov 2007
Location: NJ
Posts: 1,747
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Is there a typical warranty implied?
__________________
My ATC opinion is NOT an official FAA recognized opinion, so any advice you get from me is ONLY my opinion.
Track my RV7A!!
Bought my flying -7A
Building an -8! (Fuse)
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07-15-2011, 01:42 PM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,642
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Quote:
Originally Posted by tkatc
Is there a typical warranty implied?
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Depends on the policy of the shop, but generally if it is "yellow tagged" or otherwise certified as serviceable, that condition is valid for as long as it takes the ink to dry. After it leaves the control of the mechanic, all bets are off.
Remember that there is a difference between running a business (customer relations) and the legal requirement for maintenance/inspection. Strictly speaking, it is possible to have a component failure immediately after overhaul. I'm not aware of any FAA requirement to guarantee a warranty period.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
Last edited by Toobuilder : 07-15-2011 at 01:47 PM.
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07-15-2011, 08:22 PM
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Join Date: Nov 2007
Location: NJ
Posts: 1,747
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I guess what i am getting at is, my prop spits grease, after the overhaul, if it spits grease again, will the shop take care of me?
__________________
My ATC opinion is NOT an official FAA recognized opinion, so any advice you get from me is ONLY my opinion.
Track my RV7A!!
Bought my flying -7A
Building an -8! (Fuse)
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07-16-2011, 05:45 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Choose very carefully
Tony, really do your homework on this one! I had an FAA certified prop shop in Florida overhaul my big, 110" Hartzell three blade on my Air Tractor. The first thing was..."These blades can't be yellow-tagged because they're too thin!" What? Yep, blades wear down and mine were a few thousandths too thin...scrap. Three new blades...discounted from $12,000 to $10,000...whoopeee, what a savings.
The airplane shook so badly after the A@P installed the prop, that it ruined the gearbox by the end of the season. My bad for not taking it off sooner....another $66,000 rebuild 
All prop shops are definitely not equal, so check around your area with other A@P's and ask around...your best bet.
Best,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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