Overhead Speaker
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
Overhead Speaker
Is there any good reason to keep the overhead speaker nowadays? Other than originality? I have my headliner out replacing the interior and thought I might remove it. It's not connected to anything.
1952 170B
N8180A s/n 25032
N8180A s/n 25032
Re: Overhead Speaker
If you don't want it someone certainly will. But, ( ) the speaker is attached to the cabin roof and to the speaker housing which helps support the speaker housing which in turn holds the headliner bows. So now that you're there you can attach some wires to the speaker and run them down the fwd door post for future or maybe present use.
Jim McIntosh..
1953 C170B S/N 25656
02 K1200RS
1953 C170B S/N 25656
02 K1200RS
- Bruce Fenstermacher
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Re: Overhead Speaker
As Jim alluded to it is not that easy to remove the speaker. As he stated the speaker hold up the surrounding aluminum baffle. Your headliner bow is held up by the baffle.
Removing the speaker and the baffle would required you to find a suitable replacement for that front bow which stretches from one side to the other. Not impossible, but not that easy either.
I don't have a correct speaker and made instead a bracket out of folded aluminum to replace the speaker and hold the baffle in proper place.
Removing the speaker and the baffle would required you to find a suitable replacement for that front bow which stretches from one side to the other. Not impossible, but not that easy either.
I don't have a correct speaker and made instead a bracket out of folded aluminum to replace the speaker and hold the baffle in proper place.
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Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Overhead Speaker
I see what you mean once I took it apart. I do have a speaker out on the new audio panel we are putting in. I'll have to test the speaker to see if it still works. I think I will just run a new wire (#31) and hook it back up to the audio panel when we install it.
1952 170B
N8180A s/n 25032
N8180A s/n 25032
- Bruce Fenstermacher
- Posts: 10325
- Joined: Tue Apr 23, 2002 11:24 am
Re: Overhead Speaker
If it does not work it can be made to work. Even if it does not work and you don't want to overhaul it you might want to keep it or give it to someone who will use it. They are an odd size and can not be found. And then if you did find one you'd have to drill and tap the magnets. What ever you do, if it is the correct speaker, you have the equivalent of hens teeth. Don't through it away.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Overhead Speaker
You can remove the speaker and leave the mounting frame. My speaker has been relocated to the LH wing root but the frame is still in place, supporting the headliner.
- ghostflyer
- Posts: 1403
- Joined: Mon Apr 21, 2008 3:06 am
Re: Overhead Speaker
Found a good source for the replacement of the head liner bows. Mind had rusted away and wasn't a good option to put back with a new headliner. So my fishing tackle store had some blank fiber glass rods about a 1/4 in in diameter and they work just great. No rust stains on the headliner and you can cut them to your length.
Re: Overhead Speaker
i found a used replacement 4ohm speaker. ended up mounting it to the outside of the frame instead of the inside. it was just a little too tall to fit up against the roof. in fact the old one touches the roof skin anyway.
i cleaned up the lights and the plastic cover, fixed the interior light. speaking of interior light, has anyone put a LED version in there?
i cleaned up the lights and the plastic cover, fixed the interior light. speaking of interior light, has anyone put a LED version in there?
Re: Overhead Speaker
Part 43, Subpart D requires that a person performing an annual or 100 hour inspection shall inspect the radio and electronic system for "defects" and "proper operation" of wiring. This means your speaker MUST be in working order.
Also, be aware that many "alert" and other systems rely upon a cabin speaker. TSO-C195b addresses this : "The voice message will be annunciated over a cockpit speaker and through a headset/helmet at a volume adequate for clear understanding at high cockpit noise levels, but not excessively loud at low noise levels...."
Unless your aircraft equipment list is accompanied by a MEL which proscribes actions to compensate for the loss of the audio from the speaker, you must have a cabin/audio speaker on board and it must be operational.
FAR 135 requires a backup to the headset in the form of a speaker, and headsets must also be backed up with a handheld microphone... so to be sensible about operations in controlled airspace... you should probably repair your speaker.
Be alerted that the upcoming ADS-B will also likely require a cabin speaker.
Also, be aware that many "alert" and other systems rely upon a cabin speaker. TSO-C195b addresses this : "The voice message will be annunciated over a cockpit speaker and through a headset/helmet at a volume adequate for clear understanding at high cockpit noise levels, but not excessively loud at low noise levels...."
Unless your aircraft equipment list is accompanied by a MEL which proscribes actions to compensate for the loss of the audio from the speaker, you must have a cabin/audio speaker on board and it must be operational.
FAR 135 requires a backup to the headset in the form of a speaker, and headsets must also be backed up with a handheld microphone... so to be sensible about operations in controlled airspace... you should probably repair your speaker.
Be alerted that the upcoming ADS-B will also likely require a cabin speaker.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
Re: Overhead Speaker
That info is interesting George. I had heard it previously, but had forgotten. I operated my plane for many, many years without a workable speaker and not one of the 7-10 different AI's ever mentioned it or checked it as I always had an intercom system shortly after purchasing my plane in 1989. Approximately 6-8 yrs ago I had an A&P help me rewire my avionics, adding a avionics panel, etc. We removed the bad speaker and replaced it with a new one, but he removed my microphone jack. Just goes to show there are a lot of things that probably don't get checked at annuals according to the FAR's.
OLE POKEY
170C
Director:
2012-2018
170C
Director:
2012-2018
- Bruce Fenstermacher
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Re: Overhead Speaker
George, none of the helicopters I've ever flown part 135, have had a cabin speaker or a microphone. Can you explain that? Or maybe, just maybe a speaker and a microphone is not required.
My 170 does not have a speaker. It is not on my equipment list.
My 170 does not have a speaker. It is not on my equipment list.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Overhead Speaker
I believe he is referring to what was IN your plane when they rolled it off the line.
100s of planes don't have anything for a speaker. Heck they don't even have a radio.
And there are a 100 other things I put ahead of this however I like having mine operational. Mostly because it was there and bothered me that it didn't work.
100s of planes don't have anything for a speaker. Heck they don't even have a radio.
And there are a 100 other things I put ahead of this however I like having mine operational. Mostly because it was there and bothered me that it didn't work.
- Bruce Fenstermacher
- Posts: 10325
- Joined: Tue Apr 23, 2002 11:24 am
Re: Overhead Speaker
Even if a speaker was in your 170 when it left the factory, it can be removed. It is not a required piece of equipment. Actually most of the 170s had no radio when they left the factory. Radios where installed after delivery.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Overhead Speaker
Since the only ADS-B that MAY be required for our aircraft is an ADS-B OUT there is no speaker requirement. The ADS-B IN will not be required and even if used will not require a speaker as it just provides information useful to the pilot (i.e. WX, traffic etc.) it is not a warning system ala TCAS.gahorn wrote:
Be alerted that the upcoming ADS-B will also likely require a cabin speaker.
Karl
'53 170B N3158B SN:25400
ASW-20BL
'53 170B N3158B SN:25400
ASW-20BL
Re: Overhead Speaker
I don't know what I am doing wrong but, I can't find that sentence or any sub part of it in TSO-C195B.gahorn wrote: Also, be aware that many "alert" and other systems rely upon a cabin speaker. TSO-C195b addresses this : "The voice message will be annunciated over a cockpit speaker and through a headset/helmet at a volume adequate for clear understanding at high cockpit noise levels, but not excessively loud at low noise levels...."
But even so, that TSO addresses Aircraft Surveillance Applications which is not required for the ADSB mandate.