Rick7576 Posted August 18, 2020 Report Posted August 18, 2020 Looks like my trim Switch has gone Tits up. Anyone have a good lead on where to find one (new or rebuilt) 1988 M20K Help!! got a long trip in about a week and autopilot sure would be nice to have!! Cheers Rick Quote
warren.huisman Posted August 19, 2020 Report Posted August 19, 2020 Are you sure it is the switch? My electric trim stopped working and it was a broken wire at the end of the yoke shaft. Quote
carusoam Posted August 19, 2020 Report Posted August 19, 2020 Search around here for the details of the micro switches that gets used in the BK switch... Readily available, low cost, easy to get and use... Good luck... Best regards, -a- Quote
Rick7576 Posted August 19, 2020 Author Report Posted August 19, 2020 well now you boys have me thinking!! if it is a broken wire at the end of the yoke shaft, would the auto pilot keep working? I've lost both electrical and auto pilot trim. I know its the same trim motor. Quote
warren.huisman Posted August 19, 2020 Report Posted August 19, 2020 In my case, the autopilot trim continued to operate when I had a broken wire. I don’t have a KFC150, I have a Century Tridon. I do not know if the wiring is similar or not. Sent from my iPad using Tapatalk Quote
carusoam Posted August 20, 2020 Report Posted August 20, 2020 Often trim switches are a pair of switches to allow for error checking... If one of the switches stops operating, the manual trim will become inop... My KAP150 will continue to operate holding altitude, it never knows if I have used the trim switch or not... PP thoughts only, not a mechanic... Best regards, -a- Quote
Rick7576 Posted August 20, 2020 Author Report Posted August 20, 2020 On 8/18/2020 at 8:52 PM, warren.huisman said: Are you sure it is the switch? My electric trim stopped working and it was a broken wire at the end of the yoke shaft. BINGO !!! thank for the advice. Saved me about a grand!!!!! Cheers Rick Quote
warren.huisman Posted August 21, 2020 Report Posted August 21, 2020 20 hours ago, Rick7576 said: BINGO !!! thank for the advice. Saved me about a grand!!!!! Cheers Rick No worries - i'm sending the bill now!! 3 Quote
carusoam Posted August 22, 2020 Report Posted August 22, 2020 newer MSer terminology... As in when you are new to MS.... Should have specified... saved an AMU.... If it’s broken... aka TU... The finance administrator / FA may be looking over your shoulder... Best regards, -a- Quote
Will.iam Posted November 21, 2021 Report Posted November 21, 2021 On 8/18/2020 at 10:43 PM, carusoam said: Search around here for the details of the micro switches that gets used in the BK switch... Readily available, low cost, easy to get and use... Good luck... Best regards, -a- My autopilot kcf-150 is starting to fail the ap test especially when it’s colder outside. Then after awhile i can get the test to pass. I noticed my yoke trim switch doesn’t return very well and I probably have a weak return spring. Where can I get a new spring or switch? Central Texas aviation used to repair these trim switches but no longer does due to liability concerns over parts not being TSO. I guess their hanger fairy got nabbed. Any help would be appreciated. Quote
WilliamR Posted November 23, 2021 Report Posted November 23, 2021 @Will.iam Precision Avionics Specialists in Griffin, GA has been a good resource to repair the trim switch for the KAP/KFC 150. (770) 946-8555 William Quote
Will.iam Posted November 25, 2021 Report Posted November 25, 2021 Thank you for the info and tip. Will call them after thanksgiving. I tried spraying electric contact cleaner on the switch and that helped alot but really need to just replace the switch before the spring completely gives out. Tried spraying the selector switch on my audio panel to see if it would help with the transmission static i get on the garmin 530w and that was a mistake as now my radio altimeter is flickering at 100-300 feet and not working correctly and i noticed my stall horn is not sounding very loudly through my headset or speakers now. It sounds muted almost like the switch on the wing is not making good contact. And today the gps monetarily lost signal 4 times in a 3 hour flight. Might be coincidence or not. Quote
Matt M Posted February 6, 2022 Report Posted February 6, 2022 On 8/18/2020 at 11:43 PM, carusoam said: Search around here for the details of the micro switches that gets used in the BK switch... Readily available, low cost, easy to get and use... Good luck... Best regards, -a- Any more info on this? My trim switch is giving me some problems on my KAP-150. About a month ago would pitch up fine, down only if you pushed the buttons hard. Took it apart, sprayed some contact cleaner in it and I thought it was resolved. Today it was giving me trouble again. Autopilot worked fine, passed test and held altitude no problem. I looked around the forums for the micro switch thread, but couldn’t find anything. Matt Quote
carusoam Posted February 7, 2022 Report Posted February 7, 2022 6 hours ago, Matt M said: Any more info on this? My trim switch is giving me some problems on my KAP-150. About a month ago would pitch up fine, down only if you pushed the buttons hard. Took it apart, sprayed some contact cleaner in it and I thought it was resolved. Today it was giving me trouble again. Autopilot worked fine, passed test and held altitude no problem. I looked around the forums for the micro switch thread, but couldn’t find anything. Matt Hey Matt, im using my small screen tonight… makes things more challenging to find… try searching for… Trim micro switch then include searching for all three words… if you let google do the search, include BK with the other three… and MooneySpace. It narrows things down a bit. There is an electronics supplier that is commonly used around here… unfortunately, I don’t recall the name… hope that gets you closer… -a- Quote
Will.iam Posted March 24, 2022 Report Posted March 24, 2022 On 2/6/2022 at 5:22 PM, Matt M said: Any more info on this? My trim switch is giving me some problems on my KAP-150. About a month ago would pitch up fine, down only if you pushed the buttons hard. Took it apart, sprayed some contact cleaner in it and I thought it was resolved. Today it was giving me trouble again. Autopilot worked fine, passed test and held altitude no problem. I looked around the forums for the micro switch thread, but couldn’t find anything. Matt Just called Precision Avionics Specialists in Griffin, GA. Was going to send them my old switch to repair but waited until i downed my mooney for a throttle body overhaul that will take 6 weeks to complete and figured I’d use that down time to IRAN the switch to save some money. Come to find out Jackie at PSA said a new switch cost like $300 but to repair mine would be about $250. So for and extra $50 i get a new switch and maybe we will just solder it on the end of the wires as there is only a big cannon plug at the end of the control tube that makes disconnecting the wires through the yoke a PITA. How does anybody get their yokes wrapped in leather? Do they just cut all the wires? Or can they wrap the yokes in place if you bring them the airplane? When mooney assembled the switches on the yoke they really didn’t make it very serviceable later. Quote
Will.iam Posted September 16, 2022 Report Posted September 16, 2022 Just to follow up i wound up sending my switch in as jackie found out they were out of stock on a new one. Said mine wasn’t so much the springs but the case that holds the pin had worn to the point that it didn’t keep the pin in alignment with the spring and switch. Fixed it all up and put on about a ft of connecting wire from the switch which alliw us to fish the wires down the handle and solder them to the wires coming out of the yoke tube. Works great and improved my ap tests since the switch now springs back to neutral everytime. 4 1 Quote
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