Flaps won't retract

[M016576]

After roll out today, put up the flaps and.. Nothing happened. Cycled the switch a few times, nothing. The CB did not pop. I pulled it and reset, and still nothing. Anyone have any ideas? Am I probably buying a new flap motor?

[laytonl]

It is most likely a sticky microswitch.  There is a up limit switch and a down limit switch on the worm gear at the flap motor.  If this is the problem it is an easy fix, just remove the belly pan (or rear most panel for older models) and clean the switches.  These microswitches are really light duty and it only takes a little grease or gunk to cause them to stick.  Good luck, Lee

[M016576]

Thanks for the reply- I'll hit the hangar after work and hopefully that's the problem! Sounds like a simple enough fix.

[N201MKTurbo]

My 201 does this once in a while. Put the flap switch in the up position, turn on the master, get out of the plane, grab the flap and wiggle it up and down. It will go up. Next time you have the belly off spray the micro switches generously with tryflow and actuate them manually to work it into the switches.

[jsimmons619]

M016576  I own a 1987 M20J which had a similar problem which was caused by a relay burning out on the control board.  After having the relay replaced everything worked fine for about two years and then I burned out a second control relay.  Further investigation revealed that Mooney had experienced other owners with the same issue and they created a retrofit kit to upgrade the relays to higher amperage rated relays.  The upgrade kit was Mooney Retrofit Kit IAW DWG 940090.  I don't know if this is your issue. I just offer it as a summary of my experience.

Happy Mooney flying!

Jim Simmons

[grantdj]

Can someone send me a picture of the limit switch? I am having the same issue down works up does not. 

 

I took the belly pan off hunted all over for the limit switches near the worm gear on the flap motor and didn't see it.

 

grantdj@gmail.com is my email address, any help would be much appreciated. 

 

Thanks,

David.

[laytonl]

They are small black switches, about 1" long, right on the worm gear. You should be able to follow the wires from the flap motor to the switches. Sorry, I don't have a photo. Lee

[NotarPilot]

I would just to share my recent experience. Recently I was coming in to land at my home airport and discovered my flaps wouldn't come down. They were working earlier in the day on previous flights. My first thought was "Great! A new flap motor is gonna cost an arm and a leg." After doing some brief research and finding this thread I removed the rear belly panel, sprayed the micro switches and BAM! the flaps were working again. I'm attaching photos for future reference for others. This was performed on a 1978 J. The micro switches are right in the centerline of the plane as illustrated. I hope this helps.

[fantom]

Should be done at every annual.

[M016576]

I would just to share my recent experience. Recently I was coming in to land at my home airport and discovered my flaps wouldn't come down. They were working earlier in the day on previous flights. My first thought was "Great! A new flap motor is gonna cost an arm and a leg." After doing some brief research and finding this thread I removed the rear belly panel, sprayed the micro switches and BAM! the flaps were working again. I'm attaching photos for future reference for others. This was performed on a 1978 J. The micro switches are right in the centerline of the plane as illustrated. I hope this helps.

Yep! Worked for me too! Forgot to follow up: thanks to everyone for the help!

[bxg007]

M016576  I own a 1987 M20J which had a similar problem which was caused by a relay burning out on the control board.  After having the relay replaced everything worked fine for about two years and then I burned out a second control relay.  Further investigation revealed that Mooney had experienced other owners with the same issue and they created a retrofit kit to upgrade the relays to higher amperage rated relays.  The upgrade kit was Mooney Retrofit Kit IAW DWG 940090.  I don't know if this is your issue. I just offer it as a summary of my experience.

Happy Mooney flying!

Jim Simmons

 

Jim, it looks like I may have an issue similar to yours with my '91 TLS/Bravo.  I ordered new micro switches from Don Maxwell.  How much was the Retrofit Kit and did you order it from the factory or a MSC?  Thanks, Bill.

[bxg007]

FYI - the 940090-501 kit was $2 AMUs. It was installed today and seems to have resolved my problem. We have a few adjustments to make Monday and will be back in the air. New micro limit switches or cleaning had no effect.

Sent from my iPhone using Tapatalk

[moxfox]

Just had the same problem with the flaps not retracting after landing my Bravo , wouldn't come up . Found it the be the  relay switches. If you tapped on them ,the flaps would come up. There is a small  Circuit board that the relays are  soldered  on to , the back side of  my board was corroded some . Ordered the  retrofit kit ,and will be installing it this coming Tuesday. The micro switches are working fine.

Edited August 3, 2017 by moxfox

[carusoam]

Mox, see if you can get a picture of the corrosion on the board...

My annual is coming up and I need something looked into.

Best regards,

-a-

[moxfox]

Here you go Carusom. They are located at the forward end of the flap actuator. there are four small brass screws that hold on to a plate from the top next to the microswitches on that same end. The board faces up& relays are down.

David

Edited August 3, 2017 by moxfox

[jeffschnabel]

fyi regarding the microswitches.  in the early J models, they are a Honeywell switch.  You can buy them from Mooney for 60-80 bucks but you can find the exact same switch no. if you look online for 6 bucks.  I use a forklift parts outlet site as my go to for those switches. 

[carusoam]

There seem to be a few Honeywell industrial switches in the Mooney airframe...

Best regards,

-a-

[N201MKTurbo]

6 minutes ago, jeffschnabel said:

fyi regarding the microswitches.  in the early J models, they are a Honeywell switch.  You can buy them from Mooney for 60-80 bucks but you can find the exact same switch no. if you look online for 6 bucks.  I use a forklift parts outlet site as my go to for those switches. 

Wow, you are getting ripped off, I got the last ones on EBay for a buck each.

[N201MKTurbo]

It is interesting that they used a relay that isn't rated for DC. DC is much harder on relay contacts then AC. When a relay opens it can cause a small arc. Because AC passes through zero volts on every cycle it will break the arc as it passes through zero volts. With DC the arc will continue until the gap is big enough to break the arc. Because of this most switches and relays are rated for about 1/2 the current carrying capacity for DC.

[JohnB]

On 5/10/2014 at 8:59 PM, bxg007 said:

FYI - the 940090-501 kit was $2 AMUs. It was installed today and seems to have resolved my problem. We have a few adjustments to make Monday and will be back in the air. New micro limit switches or cleaning had no effect.

 

 

Sent from my iPhone using Tapatalk

Wow amazing, I am looking for the same kit 940090-501 Kit as my flaps won't retract, my mechanic says its the two relays up and down, namely the WC67RCSX -3 power relay x 2, which he found but one, but the other one doesn't have a base.  I am very much looking for the 940090-501 kit which is an apparently a more robust replacement. Do you or anyone else know where I can purchase one of these?

[LANCECASPER]

On 12/31/2024 at 12:44 AM, JohnB said:

Wow amazing, I am looking for the same kit 940090-501 Kit as my flaps won't retract, my mechanic says its the two relays up and down, namely the WC67RCSX -3 power relay x 2, which he found but one, but the other one doesn't have a base.  I am very much looking for the 940090-501 kit which is an apparently a more robust replacement. Do you or anyone else know where I can purchase one of these?

If you google WC67RCSX-3 they are available from different sources.

(https://www.google.com/search?q=WC67RCSX-3&rlz=1C5CHFA_enUS1031US1031&oq=WC67RCSX-3&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg80gEJMjI1MGowajE1qAIIsAIB&sourceid=chrome&ie=UTF-8)

 

I was having the exact problem on a '93 Bravo I owned back in early 2017. My IA and I replaced the WC67RCSX-3 relays and the flaps retracted and worked fine after that. I ordered two spare relays since they were getting scarce, and then sold them after selling my Bravo.

The base is already in your airplane - all you need is the relay. If you have a bad base socket it looks like this company might have one for the relay: https://4gte.com/products/magnacraft-70-303-relay-socket/?srsltid=AfmBOoqngxy0Ui1vyXWSMja0Q_zazdR9lRXdIEETNDE7wZspbH8P-qMB

[JohnB]

On 12/31/2024 at 4:25 AM, LANCECASPER said:

If you google WC67RCSX-3 they are available from different sources.

(https://www.google.com/search?q=WC67RCSX-3&rlz=1C5CHFA_enUS1031US1031&oq=WC67RCSX-3&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIGCAEQRRg80gEJMjI1MGowajE1qAIIsAIB&sourceid=chrome&ie=UTF-8)

 

I was having the exact problem on a '93 Bravo I owned back in early 2017. My IA and I replaced the WC67RCSX-3 relays and the flaps retracted and worked fine after that. I ordered two spare relays since they were getting scarce, and then sold them after selling my Bravo.

It looks like this company might have the base socket for the relay: https://4gte.com/products/magnacraft-70-303-relay-socket/?srsltid=AfmBOoqngxy0Ui1vyXWSMja0Q_zazdR9lRXdIEETNDE7wZspbH8P-qMB

Lance,

That is beyond helpful. I’ll forward the info to my mechanic , AND order some spare just in case! 
 

THANK you! 
 

John 

[LANCECASPER]

Just now, JohnB said:

Lance,

That is beyond helpful. I’ll forward the info to my mechanic , AND order some spare just in case! 
 

THANK you! 
 

John 

Just a moment ago I edited my above post: The base is already in your airplane - all you need is the relay. If you have a bad base socket it looks like that last company I linked might have one for the relay.