Gear warning switch

[carusoam]

Why put it on jacks to lower a panel to spray a switch?

Sounds too complex for something that is too complex already...

Best regards,

-a-

[KSMooniac]

Why put it on jacks to lower a panel to spray a switch?

Sounds too complex for something that is too complex already...

Best regards,

-a-

 

I would do it so I could try swinging the gear after checking the switches...

[carusoam]

That's a good reason!

-a-

[mike_elliott]

Bill, you have a squat switch on the left main. Check it. Make sure your donuts ate expanding, and not so old the cold wx keeps them compressed after liftoff.

[N231SM]

Sorry guys for repeat here. 

Hello all. I'm new to this group and proud owner of a 1980 231. Question I have involves the gear horn wiring and system. In reading some of your posts you mentioned a click that can be heard when the throttle is pulled all the way back to the closed position. I didn't have that click so I checked under the panel and discovered that that switch was out of adjustment and it did not click. There's a little Groove in that throttle cable. The micro switch is designed to drop into that little groove and it makes a clicking noise when the throttle is closed or close to being closed.  I have it adjusted so the switch activates when the throttle is about a quarter inch from being fully closed. Does anybody know the correct position that the throttle should be in when that switch clicks?

 

If anyone needs to adjust their switch, it can be real easy if you remove the screws of the instrument blocking access to the nuts behind the 4 Philips that hold the throttle micro switch assembly to the throttle cable. Mine is the radar altimeter. Just gently push it back so you can access those nuts. Otherwise it is typical Mooney in not being able to access them from below.  

Like to know if there's any thing else in that circuit that would trigger the siren in the headliner. Is there a manifold pressure switch? What has to be just right for that your horn to go off?

Scenario: The controller asks you for best forward speed. you have to drag it in and the throttle never reaches quarter inch from being closed until you are over the numbers, that could be a problem?

Since one of you guys said that age of one of those sirens is 5 years, I'd like to meet "bitchin Betty" . 

EI makes a product called and av17 which is a voice annunciator. https://buy-ei.com/wp-content/uploads/2013/06/OI-II-AV-17.pdf?x57196

If you have their engine monitor it puts out something like eight warnings verbal warnings for parameters monitored. That would be the warnings you see when the unit is flashing at you when limits are exceeded. The AV-17  can also be used to monitor the gear circuit.  It basically piggybacks the Mooney gear warning system and if everything's not well within that circuit then it will send out an audible. Maybe this is what some referred to as bitchin Betty. It's 250 or $300 depending on where you buy it. And it sounds like you wire it right into the circuit. Unfortunately I have a JPI so I wouldn't be able to use the av 17 in order to get bitched at for high EGT or high CHT etc.  Pretty nifty though. 

EI was not very helpful at all. I asked their Tech what language their alarms use.  The best he could come up with was to tell me I needed to buy a whole new system from them. 

On the contrary the tech at JPI was very helpful. As far as  using av17  just for  monitoring the gear , he said it will work fine . Does anyone know if the EI and JPI use the same language? 

I also have a radar altimeter that buzzes at  preset altitude of course. Maybe that would be the way to go. Because that instrument uses actual above-ground data. 

For me just the monitoring of the landing gear circuit is worth the money. Just curious to get any knowledge -  advice and comments from the group.

Thanks very much to the group. So far it's been invaluable to me and my research. 

 

 

 

 

[carusoam]

231SM...

Look for the wiring diagram in your POH...

Find the gear switch, and the throttle switch...

Ask your mechanic to adjust it.

The click of the switches are inaudible in flight.  In some cases barely noticeable with age...

If you need additional guidance, there is a maintenance manual that covers this kind of detail...

The MM might be posted on this site.  One can be requested from Mooney or your MSC...

There is a slight situation where the gear horn goes off needlessly, gear up / throttle out while descending...  on manual gear Mooneys, the gear sensor is a finger push away... interrupting one switch breaks the continuity, resulting in silence from the piezo horn...

The digital voices probably are using the same two sensors with a friendlier announcement ....

What MP do you see while the horn is sounding? (You gave a throttle position, which is nice, but realistically, you want the horn to sound when the MP has been pulled for landing...and the gear is still stowed...  you won't  get Best  speed with no MP....  sounds like your MP switch may be set a bit high...?

PP ideas, not a mechanic...

Best regards,

-a-

[Marauder]

Sorry guys for repeat here. 

Hello all. I'm new to this group and proud owner of a 1980 231. Question I have involves the gear horn wiring and system. In reading some of your posts you mentioned a click that can be heard when the throttle is pulled all the way back to the closed position. I didn't have that click so I checked under the panel and discovered that that switch was out of adjustment and it did not click. There's a little Groove in that throttle cable. The micro switch is designed to drop into that little groove and it makes a clicking noise when the throttle is closed or close to being closed.  I have it adjusted so the switch activates when the throttle is about a quarter inch from being fully closed. Does anybody know the correct position that the throttle should be in when that switch clicks?
 
If anyone needs to adjust their switch, it can be real easy if you remove the screws of the instrument blocking access to the nuts behind the 4 Philips that hold the throttle micro switch assembly to the throttle cable. Mine is the radar altimeter. Just gently push it back so you can access those nuts. Otherwise it is typical Mooney in not being able to access them from below.  
Like to know if there's any thing else in that circuit that would trigger the siren in the headliner. Is there a manifold pressure switch? What has to be just right for that your horn to go off?
Scenario: The controller asks you for best forward speed. you have to drag it in and the throttle never reaches quarter inch from being closed until you are over the numbers, that could be a problem?
Since one of you guys said that age of one of those sirens is 5 years, I'd like to meet "bitchin Betty" . 
EI makes a product called and av17 which is a voice annunciator. https://buy-ei.com/wp-content/uploads/2013/06/OI-II-AV-17.pdf?x57196

If you have their engine monitor it puts out something like eight warnings verbal warnings for parameters monitored. That would be the warnings you see when the unit is flashing at you when limits are exceeded. The AV-17  can also be used to monitor the gear circuit.  It basically piggybacks the Mooney gear warning system and if everything's not well within that circuit then it will send out an audible. Maybe this is what some referred to as bitchin Betty. It's 250 or $300 depending on where you buy it. And it sounds like you wire it right into the circuit. Unfortunately I have a JPI so I wouldn't be able to use the av 17 in order to get bitched at for high EGT or high CHT etc.  Pretty nifty though. 
EI was not very helpful at all. I asked their Tech what language their alarms use.  The best he could come up with was to tell me I needed to buy a whole new system from them. 
On the contrary the tech at JPI was very helpful. As far as  using av17  just for  monitoring the gear , he said it will work fine . Does anyone know if the EI and JPI use the same language? 
I also have a radar altimeter that buzzes at  preset altitude of course. Maybe that would be the way to go. Because that instrument uses actual above-ground data. 
For me just the monitoring of the landing gear circuit is worth the money. Just curious to get any knowledge -  advice and comments from the group.
Thanks very much to the group. So far it's been invaluable to me and my research. 
 
 

 
 

I have the AV-17 but don’t have it connected to the gear system. If you do get this installed, be curious how it is wired in.

I have several features connected to the AV-17 and a couple from the JPI 900. I also have EI RPM/MP & fuel pressure gauges in the plane. My EI gauges are sent through the AV-17 for those features. From the JPI, the “Check engine analyzer” is wired and somehow the shop also got the “Check voltage” feature wired in.

I originally bought the AV-17 to replace the external standalone Sonalert that was attached to the Aspen PFD and used for altitude. The AV-17’s three tones are used for the Aspen altitude alerts. This way they play through the headset.


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