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JOE HOWSE
Joined: 10 Jan 2006
Posts: 140
Location: DUNCAN BC CANADA
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 Posted: Sat Feb 23, 2013 11:59 am Post subject: prop inspection |
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is there a mandatory inpection for props on experimental aircraft?
[quote][b]
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J.C. HOWSE |
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dsavarese0812(at)bellsout
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| Posted: Sat Feb 23, 2013 12:18 pm Post subject: prop inspection |
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It depends on the certification of the prop. ie: if the propeller has
been issued a Type Certificate Data Sheet (TCDS), then whatever the TCDS
says or if the prop has any AD's, then whatever the AD's say. The
certification of the aircraft does not negate the prop certification.
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 2/23/2013 1:57 PM, Joe Howse wrote:
| Quote: | is there a mandatory inpection for props on experimental aircraft?
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mark.bitterlich(at)navy.m
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| Posted: Mon Feb 25, 2013 12:15 pm Post subject: prop inspection |
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This minor addition to what Dennis wrote is specifically pointed towards
AD's .... not just prop AD's but *ALL* AD's that are written on Type
Certificated Parts that happen to reside in an Experimental Aircraft.
I've been through this in detail with both the FAA and the EAA, and can
speak to it from personal experience and please realize local FSDO's
might not agree with what I am saying here, but will shortly after they
read the material you can get from the EAA.
Aircraft owners that have AD's on Type Certificated Parts that are in
their Experimental Aircraft must comply with *THE INTENT* of the AD but
not necessarily with exactly what the AD specifies. On a Certificated
Aircraft, the owner must comply with EXACTLY what the AD says.
So what does that mean exactly? Let's say you removed the mechanical
fuel pump from the GSO-480 Lycoming Engine in your UTVA-66 and replaced
it with an external fuel pump. An AD comes out on the GSO-480 original
engine fuel pump. Kind of hard to comply with since you put in an
electric pump, so you no longer have the mechanical pump, and thus by
changing the design you have "complied with the intent" of the AD.
The same thing could apply to say .... the MAG's, when you replaced them
with some kind of electronic ignition. You're allowed to do this kind
of thing even on a certificated engine, because it does indeed reside in
an Experimental Aircraft.
So while this is a small point to make, it is indeed true. There is a
small, but notable difference in doing EXACTLY what the AD says
(certificated aircraft) and what the INTENT of the AD is, in an
Experimental Aircraft with a Certificated Part.
Mark Bitterlich
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N13472(at)aol.com
Guest
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| Posted: Mon Feb 25, 2013 12:26 pm Post subject: prop inspection |
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Question? I have been told that if you remove the ( Certified ) Engine etc. Data plate it is now
completely experimental
and the AD's are moot? Anyone have good info on this?
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 541-297-5497
N13472(at)AOL.COM
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rmhou(at)yahoo.com
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| Posted: Mon Feb 25, 2013 1:00 pm Post subject: prop inspection |
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I think AC 39-7D is the latest authority on these issue. I am attaching it here.
See paragraph 9 & 10 on pages 3 and 4.
"Each AD contains an applicability statement specifying the product (aircraft, aircraft engine, propeller, or appliance) to which it applies. Unless stated otherwise (see subparagraph 9b of this AC), ADs only apply to type-certificated (TC) aircraft, including ADs issued for an engine, propeller, and appliance."
"Non-TC’d aircraft (e.g., amateur-built aircraft, experimental exhibition) are aircraft for which the FAA has not
issued a TC under part 21. The AD applicability statement will identify if the AD applies to non-TC’d aircraft or engines, propellers, and appliances installed thereon."
From: Tom Elliott <N13472(at)aol.com>
To: yak-list(at)matronics.com
Sent: Monday, February 25, 2013 12:23 PM
Subject: RE: prop inspection
--> Yak-List message posted by: "Tom Elliott" <N13472(at)aol.com (N13472(at)aol.com)>
Question? I have been told that if you remove the ( Certified ) Engine etc. Data plate it is now
completely experimental
and the AD's are moot? Anyone have good info on this?
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 541-297-5497
N13472(at)AOL.COM (N13472(at)AOL.COM)
--
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| Description: |
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Download |
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AC_39-7D.pdf |
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1036 Time(s) |
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rmhou(at)yahoo.com
Guest
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| Posted: Mon Feb 25, 2013 2:19 pm Post subject: prop inspection |
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Hi Tom,
Paragraph 9.c. of AC 39-7D states the following:
"An AD applies to each product identified in the applicability statement, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of the AD."
Here is my reading: If the removal of the data plate is a modification to the engine, the AD is still applicable to the modified engine.
Most Lycoming AD's have the similar language in the AD. For example, #98-02-08 says: "This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. "
So the removal of the data plate most likely does not change the AD applicability.
Robin
From: Robin Hou <rmhou(at)yahoo.com>
To: "yak-list(at)matronics.com" <yak-list(at)matronics.com>
Sent: Monday, February 25, 2013 12:58 PM
Subject: Re: prop inspection
I think AC 39-7D is the latest authority on these issue. I am attaching it here.
See paragraph 9 & 10 on pages 3 and 4.
"Each AD contains an applicability statement specifying the product (aircraft, aircraft engine, propeller, or appliance) to which it applies. Unless stated otherwise (see subparagraph 9b of this AC), ADs only apply to type-certificated (TC) aircraft, including ADs issued for an engine, propeller, and appliance."
"Non-TC’d aircraft (e.g., amateur-built aircraft, experimental exhibition) are aircraft for which the FAA has not
issued a TC under part 21. The AD applicability statement will identify if the AD applies to non-TC’d aircraft or engines, propellers, and appliances installed thereon."
From: Tom Elliott <N13472(at)aol.com>
To: yak-list(at)matronics.com
Sent: Monday, February 25, 2013 12:23 PM
Subject: RE: prop inspection
--> Yak-List message posted by: "Tom Elliott" <N13472(at)aol.com (N13472(at)aol.com)>
Question? I have been told that if you remove the ( Certified ) Engine etc. Data plate it is now
completely experimental
and the AD's are moot? Anyone have good info on this?
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 541-297-5497
N13472(at)AOL.COM (N13472(at)AOL.COM)
--
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dbotich
Joined: 06 Apr 2014
Posts: 11
Location: Bend, OR
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| Posted: Wed May 28, 2014 8:55 am Post subject: Re: prop inspection |
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Here is my two cents on your original question. There is no MANDATORY inspection on your propeller unless:
1. There are airworthiness limitations specified by the manufacturer in the TCDS (type certificate data sheet). This could be spelling out life limited components or even an inspection.
2. There is an AD issued for your propeller.
If your prop was not built under a TC then #1 above does not apply. If there is an AD on your prop then your must comply with the AD. AD's typically do not tell you to inspect/overhaul IE TBO. Experimental does not exempt you from AD's, period.
TBO's are issued by the manufacturer and are NEVER mandatory. Only the FAA can enforce and create regulatory policy, not the manufacturer. The manufacturer can only issue recommendations (IE TBO's) but cannot enforce those.
If you are interested in reading more on FAA v manufacturers requirements you can go to my blog here: http://aviationconsulting.blogspot.com/
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