---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 05/22/15: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:55 AM - Re: Transpondertest (Art Zemon) 2. 07:13 AM - Mounting "things" (David Saylor) 3. 07:52 AM - Re: Transpondertest (Kelly McMullen) 4. 02:49 PM - Re: Transponder test (Rob Housman) 5. 05:40 PM - Alternator Shunt (BobbyPaulk@comcast.net) 6. 09:10 PM - Re: Alternator Shunt (highwire) ________________________________ Message 1 _____________________________________ Time: 04:55:35 AM PST US Subject: Re: AeroElectric-List: Transpondertest From: "Art Zemon" =0AFolks,=0A =0ASometimes the transponder test finds failures in the pneuma tic tubing or in the antenna. It's not a bad safety investment, since we al l share the sky, IMHO.=0A =0A -- Art Z.=0A =0A--[ http://CheerfulCurmudg eon.com/ ]( http://CheerfulCurmudgeon.com/ )"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hil lel=0A ________________________________ Message 2 _____________________________________ Time: 07:13:04 AM PST US From: David Saylor Subject: AeroElectric-List: Mounting "things" I agree, the MMC solution is quick and easy. FWIW, a few more details: I was able to find some Hysol in cartridges that looked and smelled like the stuff that comes with clickbonds called Hysol/Loctite 8000. Also, I recall bending the edge of the washer slightly in 3-4 places with some duckbills. Picture attached. That prevents squeeze-out of the glue under the washer's flange, and allows for a little cavity between the washer and the screw. Of course the customer is always right, so they must have had some pretty good glue (insulation?) to justify metal locknuts so close to the adhesive ;-) --Dave ________________________________ Message 3 _____________________________________ Time: 07:52:13 AM PST US From: Kelly McMullen Subject: Re: AeroElectric-List: Transpondertest Just to be clear....what is tested depends on what the aircraft has installed, and its desired use. There are aircraft that have transponders without an altitude encoder...only the transponder signal output is tested. There are VFR only aircraft with transponder and encoder, where the transponder with Mode C output is looked at to match altimeter at field elevation and maybe one more altitude. There are IFR aircraft with transponder and encoder that need certification of the altimeter, encoder and static system at 500 ft intervals up to max certified altitude. To show that they are related but separate...if a transponder is removed for repair/alignment or to just clean the contacts, only a ramp check of the transponder output is needed. If an IFR aircraft needs the static system opened, to replace something, repair a line, etc. the A&P doing the work can do a simple leak check...no repeat of full static system is required. Two most common failures I have seen are static system plumbing leaks (including instrument housing leaks), and coax to the antenna failure. Antennas rarely fail for anything other than physical damage. On 5/22/2015 4:53 AM, Art Zemon wrote: > > Folks, > > Sometimes the transponder test finds failures in the pneumatic tubing > or in the antenna. It's not a bad safety investment, since we all > share the sky, IMHO. > > -- Art Z. > > -- > http://CheerfulCurmudgeon.com/ > > /"If I am not for myself, who is for me? And if I am only for myself, > what am I? And if not now, when?" Hillel/ > > * > > > * ________________________________ Message 4 _____________________________________ Time: 02:49:50 PM PST US From: Rob Housman Subject: RE: AeroElectric-List: Transponder test All the replies I have seen so far have assumed that your aircraft is registered in the US. If not, then The FAA regs do not apply. Best regards, Rob Housman Irvine, CA Europa XS A070 Airframe complete Working on aviaonics -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Werner Schneider Sent: Thursday, May 21, 2015 4:29 AM Subject: AeroElectric-List: Transpondertest --> Good morning folks, I need some help in FAA regulations (being a Swiss). FAR 43 Appendix F describes some transponder testing in order to be compliant with FAR 91.413, which in itself redirects to 91.215a and 121.345 as well as 135.143 and there more redirections come into play. Can someone explain me, if for a VFR only aircraft in the US with Transponder equipped you need to perform a regular system check to be compliant with the FAR's according to FAR 43 APP F? Many thanks for your input on that. Cheers Werner ________________________________ Message 5 _____________________________________ Time: 05:40:13 PM PST US From: BobbyPaulk@comcast.net Subject: AeroElectric-List: Alternator Shunt I have added a 40 amp alternator to my airplane / engine and would like to reverse the flow thru the shunt since it is bolted in place and would be inconvenient to relocate. I am fairly sure it just has a built in resistor for measuring the drop across it so it should be O.K. I have changed the high side of the amp meter read out to the new inlet. Am I safe to ass u me this is o.k.? Bobby Jabiru 3300 ________________________________ Message 6 _____________________________________ Time: 09:10:41 PM PST US Subject: AeroElectric-List: Re: Alternator Shunt From: "highwire" Sure. A standard ammeter shunt is a special resistor that drops 50 milli-volts at rated current. So, you've got the idea, swap the current terminals, swap the voltage terminals then. You're back in business. ron Read this topic online here: http://forums.matronics.com/viewtopic.php?p=442479#442479 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.