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Com Question

Old 31st Dec 2014, 17:13
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Com Question

First post so here goes...

sorry if this is covered elsewhere but I searched, honest!

I have just bought a PA28 140 that doesn't have an intercom. I understand that it is permissible to replace the radio/com myself, would this also include fitting an intercom such as a sigtronix.

Simon
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Old 31st Dec 2014, 18:57
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What registry? (NabcXY? G-xxxx? ...? ) What regulations? (Experimental/homebuilt? Certified?)

The harsh facts should however leave room for a warmhearted "welcome to this forum" !
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Old 31st Dec 2014, 19:02
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You have 2 choices

1) have an avionics shop install a panel mount intercom

2) buy a portable intercom. These units connect to the existing radio jacks and are not considered installed equipment.

Advantages of 1: clean and neet, intercom is integrated into radio install.
Disadvantages: expensive

Advantages of 2: inexpensive
Disadvantages: the cockpit looks looks an explosion in a spaghetti factory with wires running all over the place. There is no place to plug in the intercom in a older Cherokee so you need to run the intercom off a battery
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Old 31st Dec 2014, 20:10
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If it's N reg and you own it and hold an FAA license this is item 31 of the 32 things you are allowed to do yourself.

Removing and replacing self-contained, front instrument panel-mounted navigation and communication devices that employ tray-mounted connectors that connect the unit when the unit is installed into the instrument panel, (excluding automatic flight control systems, transponders, and microwave frequency distance measuring equipment (DME). The approved unit must be designed to be readily and repeatedly removed and replaced, and pertinent instructions must be provided. Prior to the unit's intended use, an operational check must be performed in accordance with the applicable sections of part 91.
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Old 31st Dec 2014, 20:51
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Wow, friendly bunch...

Thanks for the kind words.

Time to go elsewhere for help and advice methinks

See ya

Simon
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Old 31st Dec 2014, 23:25
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Hey Simon T,

Don't go. Hang around and you will learn a lot. Ignore the curmudgeons.

I42
(another Simon)
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Old 1st Jan 2015, 00:40
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SimonT

There are a lot of people on this forum who are so far up themselfs it is hard to understand why ?

Pirke is new but the only two posts I have seen from this individual have been at the very least unhelpfull.

The idiots are outnumbered out roughly 2:1 by people who are helpfull.

Back to the subject, Big Pistons as usual offers sound advice that I would agree with wholeheartedly.
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Old 1st Jan 2015, 10:16
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A and C, without any information on how the plane is registered it's impossible to answer what is allowed and what is not.

And I truly wonder if he did any research before buying if you buy a plane and after that start to think about how to operate it.

I met a guy who bought a nice twin without engines, not knowing the price of an IO540... He simply assumed he could afford it and he assumed he got a nice deal. Then he was very surprised that the engines were a multiple of what he paid for the plane itself which he obviously couldn't afford. These people exist... And more than I'd like to know.
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Old 1st Jan 2015, 11:04
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.
Piperboy84... you say....
Removing and replacing self-contained, front instrument panel-mounted navigation and communication devices that employ tray-mounted connectors


This I take to mean that you can slide in or out any equipment that uses a tray....
However, I think the tray needs to be fitted by a qualified technician in the first place.



Also, from memory, an intercom is not a tray mounted piece of kit?
.
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Old 1st Jan 2015, 11:18
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You are a mean & cliquey lot.

The poor guy is obviously in the UK, 99% sure to be G registered and he's likely got himself a nice properly equipped a/c, only wants to know if adding an intercomm is O.K.

Could be the radio has that facility or a plug in as mentioned above would do the job.

Happy New Year to everyone,

mike hallam, England
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Old 1st Jan 2015, 11:37
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Simon T

I am going to take a guess that your aircraft is also lacking an 8.33 radio.

Any decisions on Avionic changes need to incorporate changes in the other parts of the Avionic system for economic reasons.
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Old 1st Jan 2015, 12:39
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@Simon T: it wouldn't be nice on you to go off without having supplied the information that is really required for a useful answer. Even if there are some curmudgeons resident, there also are some people that genuinely want to be of help - do give them a chance!
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Old 1st Jan 2015, 15:57
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All the first reply needed was to ask for further information and the reason why.
Happy new year everyone.

Last edited by Pilot DAR; 1st Jan 2015 at 16:10. Reason: Theme was right, some language wrong
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Old 1st Jan 2015, 16:17
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Simon, Welcome. You were rudely treated without cause. Please give the benefit of the doubt to many very good posters here.

Your question is fair, in the following context:

The owner pilot may be permitted to replace one comm for another - in the tray. If there is zero wiring change, or work with tools behind the panel, a simple swap of one for another in the same tray is usually okay. You will find that there are "newer" comms, which are designed to slide into older trays. But, some homework will be required on your part with this, and your question does not provide enough information for anyone willing to help you here.

Sigtronics does make a battery powered plug in only intercom, and yes, you can install that too. But anything which involves a wiring change behind the panel will have to be accomplished by an avionics shop, unless the aircraft is non certified. BPF has summed it up nicely.

Welcome to general aviation - lots of really nice, helpful people, and a few others too....
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Old 1st Jan 2015, 16:38
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Thanks for the response, that was all I needed

Simon
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Old 1st Jan 2015, 18:46
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Simon, if you have to go the trouble of paying for an intercom to be installed you may want to look at installing a PS Engineering PAR 200 audio panel it has an top notch IC with an integrated 8.33 com radio , Bluetooth p, monitor mode etc

Edit to add: it's kind of strange that Piper put out a Warrior in the 1960/70's without some kind of intercom or at least wired for one, even base models were pretty well appointed back then, I had a 151 which was built the first year after they stopped making the 140, it was VFR but had a 4 place intercom, even had a wing leveler.

Last edited by piperboy84; 1st Jan 2015 at 19:08.
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Old 1st Jan 2015, 18:57
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don't mean to be confrontational, but were some people actually born knowing everything?
I am also new to aviation and learn a lot from this forum but I don't know everything and should I need an answer I would ask, as I imagine everyone on this forum has at some point.
I read a lot that there are no stupid questions, yet I continually see poster's questions being mocked with stupid answers.
I realise that some you are mighty sky gods, but where did you start?
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Old 1st Jan 2015, 19:16
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Personally, I started many decades ago, flying C 150's and I still do. Since, I have been privileged enough to fly other types as well. The few sky gods here (and there are a few by my standards), are polite, helpful, and reserved. Others of us are not at all sky gods, just some have been flying for quite a while, and picked up some wisdom along the way.

yet I continually see poster's questions being mocked with stupid answers
Aside from the very occasional bit of light hearted joking around, mocking, and similar noninclusive behaviour, is not welcomed at PPRuNe. Feel free to report posts which you feel are offensive.
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Old 1st Jan 2015, 19:53
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Apologies, I know there are many on here that are very knowledgeable, but there are a few that assume since they were born knowing it all, everyone else must do also!

There were replies to this thread (which appear to have disappeared) which were less than helpful shall we say, If I know the answer to a question I will reply, if I don't I wont, simple as that.

To reply with comments like 'if you don't know you shouldn't be buying, owning, flying etc.' are about as helpful as a chocolate teapot!

I have seen some post's where even I, as a beginner know the answer, but everyone had to start somewhere, and nobody decided 'since I know everything there is to know about aviation, I'll learn to fly!'

It is really off putting when somebody asks a question to see replies that to me say, you don't know enough so go away!
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Old 1st Jan 2015, 20:31
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I wouldn't go as far as to say most are offensive, more of a condescending nature, which I feel put people off asking questions.

We can all learn something new from even the most routine of questions and answers, and if it makes for safer pilots then it can only be a good thing and the more topics that are covered the better.
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