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jhasbrouck(at)woh.rr.com
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 Posted: Sat Feb 25, 2006 9:03 am Post subject: IFR GPS |
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You say you want a reference for IFR or VFR GPS installations? Try:
AC20-130A. This Advisory Circular is the basis for not only GPS but
VLF/Omega and Loran-c. You will notice if you read it that the previously
mentioned criterion for approval are indeed valid. The final approval rests
with the FSDO. In the past the FAA has dodged questions of IFR operation
of experimental category aircraft, operating in a seemingly don't ask, don't
tell mode. My guess is that everyone will be happy until someone in an
experimental creates a problem in the system that causes an accident, then
the FAA tombstone regulation machine will kick into high gear. Suggest any
installation be installed and tested according to the guidance in the
circular to protect both of our buts.
John Hasbrouck
#40264
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GRANSCOTT(at)aol.com
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| Posted: Sun Feb 26, 2006 4:58 am Post subject: IFR GPS |
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In a message dated 2/25/06 12:04:29 P.M. Eastern Standard Time, jhasbrouck(at)woh.rr.com writes:
| Quote: | The final approval rests
with the FSDO. |
If you have the opportunity to research this, I believe you'll find that this information may have been supplemented, additionally you'll find that about a year or so ago the FAA changed it's policy on GPS's, they can now legally be installed by an A&P in a certified aircraft instead of the IA that was required before nor does the FSDO currently have to do an inspection of each installation and sign it off during testing at it did in the original circular. The current thought is that IFR GPS are basically bullet proof, if installed per manufacturers instructions and it you follow the installation instructions as to placement etc of critic components then the GPS will meet the TSO standards. You can question your local FSDO...it you've still are required to test fly the IFR GPS in VRF conditions to test and note the GPS in service in you frame log...
Sorry of the sudden entry, I've been lurking on line for a while...currently own a PA 28 235 with an IFR Cert'd GPS, restoring a J 5--with the best GPS of all...a clear windshield and hope to clear enough time to begin an RV 10, thus I've been lurking on line and learning. But with the GPS question I though I'd chip in a little background info that I've kept track of in the past couple of years.
I'm located in PA at N 57...New Garden Airport...am President of EAA Chapter 240, www.eaa240.org if you want to visit our Chapter Web site. We have 3 members that are currently building RV 10's several that are flying various RV's and one RV 8 in our hangar getting it's finishing touches...Lucky Macy, as he's just received his "pink" slip, ready for taxi testing etc. By the way my name's Patrick Scott...and it has been great to read your information I'd like to thank all for sharing so much and it's good to see a few ol Mooney folks on the line. Plus visit Dan C's web site, plus I watch and Doug Petersen's 10 come together..Rivet Boy...John G is from the Piper site I also read and post on...
This group has been a very good learning experience for me and I hope to meet a few of you at SnF as I'll be there from Tuesday to Thursday...coming down commercial to attend a friend's wedding and then will be extending into SnF. No I'm not related to the other Mr Scott of Van's...
Sorry to have jumped on so directly...but the GPS thing is one avionics item that's changing somewhat quickly in FAA terms; like others have suggested you may want to located the antenna as close as possible to your unit; and I don't believe you want to do this for line lose reasons but because of potential interference...one thing to keep in mind GPS antennae do not slick out into the slip stream compared to radio antennae; so a position behind the upper "dome" of the cabin top may not really effect your aerodynamics greatly. I'm not an IA/A&P but I'd probably guess if you check with any avionics shop that they'd tell you the antenna will need to be a permanent installation and not like a hockey puck you can stick up in a glare screen area and later remove to another location. Antenna must be fixed in place for IFR operations. IFR equipment generally is required to be permanently installed with current data base, per instructions and FAA requirements. Thus a porcine coupler/unit etc temp antenna's etc...will probably not meet requirements...IMHO
please do not archive
Patrick Scott
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Tim(at)MyRV10.com
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| Posted: Sun Feb 26, 2006 5:37 am Post subject: IFR GPS |
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Man, check out the newcomer. Good info, great post, and he even
knows how to use the "do not archive". Patrick, we're glad to
have you on the list.
As far as my GPS antenna's go, I want nothing but the best in
signal, so I didn't go with any internal mounting at all. I know
from a few years with handhelds that they can work fine on
the glareshield. But, this is an IFR GPS install, and I agree
as below....permanent mount, and find the best suitable place.
Antennas and N-Number's aren't what makes a plane ugly. Ugly
paint is what makes them ugly. I just want to have a GPS that
never says "loss of coverage" to me.
I have my Chelton's GPS antenna on the top of the tailcone,
and my GNS480's antenna right on the top of the canopy behind
the support bar. The wires ran up the support bar tube.
Tim Olson - RV-10 N104CD - Flying
do not archive
GRANSCOTT(at)aol.com wrote:
| Quote: | In a message dated 2/25/06 12:04:29 P.M. Eastern Standard Time,
jhasbrouck(at)woh.rr.com writes:
The final approval rests
with the FSDO.
If you have the opportunity to research this, I believe you'll find that
this information may have been supplemented, additionally you'll find
that about a year or so ago the FAA changed it's policy on GPS's, they
can now legally be installed by an A&P in a certified aircraft instead
of the IA that was required before nor does the FSDO currently have to
do an inspection of each installation and sign it off during testing at
it did in the original circular. The current thought is that IFR GPS
are basically bullet proof, if installed per manufacturers
instructions and it you follow the installation instructions as to
placement etc of critic components then the GPS will meet the TSO
standards. You can question your local FSDO...it you've still are
required to test fly the IFR GPS in VRF conditions to test and note the
GPS in service in you frame log...
Sorry of the sudden entry, I've been lurking on line for a
while...currently own a PA 28 235 with an IFR Cert'd GPS, restoring a J
5--with the best GPS of all...a clear windshield and hope to clear
enough time to begin an RV 10, thus I've been lurking on line and
learning. But with the GPS question I though I'd chip in a little
background info that I've kept track of in the past couple of years.
I'm located in PA at N 57...New Garden Airport...am President of EAA
Chapter 240, www.eaa240.org <http://www.eaa240.org> if you want to visit
our Chapter Web site. We have 3 members that are currently building RV
10's several that are flying various RV's and one RV 8 in our hangar
getting it's finishing touches...Lucky Macy, as he's just received his
"pink" slip, ready for taxi testing etc. By the way my name's Patrick
Scott...and it has been great to read your information I'd like to thank
all for sharing so much and it's good to see a few ol Mooney folks on
the line. Plus visit Dan C's web site, plus I watch and Doug
Petersen's 10 come together..Rivet Boy...John G is from the Piper site I
also read and post on...
This group has been a very good learning experience for me and I hope to
meet a few of you at SnF as I'll be there from Tuesday to
Thursday...coming down commercial to attend a friend's wedding and then
will be extending into SnF. No I'm not related to the other Mr Scott of
Van's...
Sorry to have jumped on so directly...but the GPS thing is one avionics
item that's changing somewhat quickly in FAA terms; like others have
suggested you may want to located the antenna as close as possible to
your unit; and I don't believe you want to do this for line lose reasons
but because of potential interference...one thing to keep in mind GPS
antennae do not slick out into the slip stream compared to radio
antennae; so a position behind the upper "dome" of the cabin top may not
really effect your aerodynamics greatly. I'm not an IA/A&P but I'd
probably guess if you check with any avionics shop that they'd tell you
the antenna will need to be a permanent installation and not like a
hockey puck you can stick up in a glare screen area and later remove to
another location. Antenna must be fixed in place for IFR operations. IFR
equipment generally is required to be permanently installed with current
data base, per instructions and FAA requirements. Thus a porcine
coupler/unit etc temp antenna's etc...will probably not meet
requirements...IMHO
please do not archive
Patrick Scott
|
| | - 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 |
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